Sundayou Guqin Frequently Asked Questions

We offer a full spectrum of personalization options to create your unique instrument:

• Wood Selection & Pairing: Choose from woods like aged Chinese fir (Cunninghamia lanceolata), Paulownia (Paulownia fortunei), rosewood (e.g., Zitan), and others for the top and back plates.
• Tonal Character Customization: Specify your preferred tonal profile—deep and resonant, bright and articulate, or balanced and versatile.
• Lacquer Style & Finish: Select the color, sheen (high-gloss, matte, satin), and any special texture effects.
• Decorative Elements: Incorporate custom inscriptions, inlays using materials like mother-of-pearl, jade, silver wire, or gold leaf.
• Ergonomic & Structural Adjustments: Tailor details that affect playability, such as the height of the bridge (Yueshan), the curvature of the nut (Longyin), and the style of tuning pegs (Zhen).
• Accessory Selection: Choose matching accessories: a custom-fit carry bag, stand, table, and maintenance kit.
• Cultural Personalization: Commission a unique name for your guqin, along with custom seal engravings and calligraphy.

Our master luthiers provide expert guidance throughout the selection process to align your vision with acoustic and structural excellence.

We have established a robust communication framework for our international clientele:

• Dedicated Project Coordinator: A bilingual specialist is assigned to manage your project from start to finish.
• Scheduled Progress Updates: Receive detailed reports with high-resolution photographs every 2-4 weeks.
• Milestone Approvals: Formal confirmations are required at key stages: final design, wood selection, pre-lacquering, etc.
• Flexible Scheduling: We accommodate calls across major time zones (Asia, Europe, Americas).
• Multilingual Support: Primary support in English and Mandarin. Japanese, Korean, German, and French assistance is available upon request.
• Virtual Final Inspection: A live video walkthrough of the completed instrument can be arranged prior to shipping.
• Client Portal: Access a secure online platform to view all project documents, timelines, and media.

Institutional clients benefit from enhanced communication protocols, including dedicated points of contact and customized reporting.

Our contract is designed for clarity and mutual protection, ensuring a smooth project flow.

• Contractual Framework Includes:
  • Comprehensive technical specifications (materials, dimensions, finishes).
  • A detailed production schedule with defined milestones.
  • Total project cost, payment schedule, and currency.
  • Roles and responsibilities of both parties.
  • Clear acceptance criteria and final inspection process.
  • Logistics, insurance, and import duty responsibilities (Incoterms specified).
  • Warranty terms and after-sales service details.
  • Agreed methods for dispute resolution.
• Standard Payment Schedule:
  1. Deposit upon signing: 30% - 50% of total value.
  2. Progress payment at a major milestone (e.g., after carving): 30% - 40%.
  3. Final balance due prior to shipment: 20% - 30%.
• Accepted Payment Methods:
  • International Bank Wire Transfer (Telegraphic Transfer).
  • PayPal (a processing fee of 3.5% - 4.5% applies).
  • Major Credit Cards via a secure payment gateway.
  • For clients in Mainland China: Alipay, WeChat Pay.

Contracts are provided in bilingual (English/Chinese) versions. Customized payment plans can be discussed for substantial or institutional orders.

We accommodate design evolution within a structured framework to manage feasibility, cost, and timeline.

• Grace Period for Revisions: Minor adjustments can be made free of charge within 7 days of contract signing, provided no irreversible work (like wood cutting) has commenced.
• Post-Commercement Changes:
  • Changes requested after production begins may incur additional costs and cause delays.
  • The impact varies significantly: a color change is simpler than altering the wood species or structural dimensions.
  • We will always provide a detailed change order outlining new costs and an updated timeline before proceeding.
• Major Structural Revisions: Significant changes requested at advanced stages (e.g., after lacquering) may be technically unfeasible or require partial reconstruction, involving considerable additional cost and time.
• Formal Change Process:
  1. Client submits a formal change request.
  2. We conduct a technical and logistical assessment.
  3. A formal "Change Order" proposal with cost and schedule impact is provided.
  4. Upon written client approval, work proceeds under the revised agreement.

We strongly encourage clients to finalize all design details during the initial consultation phase. We provide comprehensive checklists and 3D renderings (where applicable) to aid this process.

The choice of wood is fundamental to the instrument's voice. Here are the acoustic properties of our primary materials:

• Aged Chinese Fir (30+ years)
  • Tonal Profile: Warm, mellow, with rich, complex overtones and a deep, sustaining bass.
  • Ideal For: Traditional repertoire, studio recording, and players seeking a classic, rounded tone.
  • Key Advantage: Exceptional stability; the tone matures beautifully over time.
• Paulownia Wood
  • Tonal Profile: Clear, bright, and articulate, with excellent note definition and projection.
  • Ideal For: Modern compositions, ensemble playing, and performers who value clarity in the high register.
  • Key Advantage: Lightweight and responsive, offering a more immediate sound.
• Rosewood (e.g., Zitan - Dalbergia spp.)
  • Tonal Profile: Powerful, focused, with a robust fundamental and exceptional dynamic range.
  • Ideal For: Solos requiring strong presence, music with dramatic dynamic contrasts.
  • Key Advantage: High density provides great sustain and structural longevity.
• Composite Construction (Dual-wood)
  • Involves pairing different woods for the top (soundboard) and back plate.
  • Allows for precise tonal shaping—e.g., a fir top for warmth with a harder wood back for focus.
  • Requires master-level skill from the luthier to harmonize the materials acoustically.
• Other Specialty Woods
  • Huanghuali (Dalbergia odorifera): Prized for its exquisite figure, offering a sweet, nuanced tone.
  • Golden Silk Nanmu (Phoebe zhennan): Known for its aromatic quality and a pure, crystalline sound.
  • Note on Sustainability: All rare woods are sourced with verifiable CITES certification where applicable.

Selection Guidance: Beginners often find aged fir offers the most forgiving and balanced tone. Advanced players should select based on their musical genre and tonal preference. For institutions, consistency and durability are key considerations.

Sustainability is a core principle at Sundayou. We are committed to ethical and environmentally responsible sourcing.

• Forest Stewardship Council (FSC) Certification: Our primary tonewoods are sourced from FSC-certified, sustainably managed forests.
• Reclaimed & Antiqued Wood: Much of our "old wood" comes from salvaged timbers—centuries-old beams from demolished traditional structures, providing unparalleled stability without new logging.
• Full Traceability: For all domestically sourced wood, we maintain chain-of-custody documentation from origin to workshop.
• CITES Compliance: Any imported species regulated under the Convention on International Trade in Endangered Species (e.g., certain rosewoods) are accompanied by valid CITES permits.
• Eco-Conscious Processing: We utilize energy-efficient, solar-assisted kilns for wood drying to minimize our carbon footprint.
• Waste Minimization: Off-cuts and sawdust are repurposed for smaller accessories, donated to craft programs, or used as biofuel.

We provide sourcing documentation upon request. Institutional partners can receive a detailed sustainability audit report.

We champion a hybrid approach, prioritizing traditional natural lacquer while incorporating the highest standards of modern, non-toxic finishes.

• Natural Raw Lacquer (Sheng Qi):
  • Source: A 100% natural resin harvested from lacquer trees (Toxicodendron vernicifluum).
  • Benefits: Creates an incredibly hard, durable, and breathable finish that deepens in luster over centuries. It is the authentic finish of historical guqins.
  • Safety: Once fully cured and polymerized (a process taking months), it is completely inert and safe. Uncured lacquer can cause allergic reactions, so our artisans use professional protective equipment.
• Modern Eco-Friendly Finishes:
  • Application: Used for specific aesthetic effects (e.g., opaque colors) or as a stable base layer when requested.
  • Standards: All products comply with stringent international regulations such as EU REACH and have ultra-low VOC (Volatile Organic Compound) emissions.
  • Examples: Advanced water-based polyurethanes, UV-cured resins derived from plant oils.
• Pigments & Coloring Agents:
  • Traditional: Mineral-based pigments (cinnabar, malachite) for historical accuracy.
  • Modern: High-quality, lightfast organic pigments that are heavy-metal free.

Every finished instrument undergoes independent VOC testing to guarantee it is safe for indoor use. Test reports are available upon request.

The string material is crucial for both sound and feel. We offer a range to suit different playing styles and philosophies.

Our standard configuration includes high-end steel-nylon strings. Substitutions can be made, which may affect the final cost and delivery schedule. We provide comprehensive guidance on the care of each string type.

We implement specific stabilization protocols based on the destination's typical environment:

• For Arid/Dry Climates (e.g., Southwestern USA, Middle East):
  • Pre-Shipment Conditioning: The instrument is slowly acclimatized to a lower relative humidity (RH) in our controlled workshop.
  • Structural Reinforcement: Critical joints are secured with adhesives formulated for dry conditions.
  • Client Guidance: We strongly recommend using a room humidifier to maintain an RH of 40-60% and include a hygrometer with the shipment.
• For Humid/Tropical Climates (e.g., Southeast Asia, Coastal Regions):
  • Enhanced Moisture Protection: Additional sealing layers and moisture-resistant lacquer formulations are applied.
  • Included with Shipment: Silica gel desiccant packs and a humidity indicator are placed inside the case.
  • Client Guidance: Advice on using dehumidifiers or climate-controlled storage, especially during monsoon seasons.
• For Climates with Extreme Seasonal Swings:
  • Robust Construction: We prioritize woods known for exceptional dimensional stability and use flexible, high-quality adhesives.
  • Strategic Storage Advice: Guidance on avoiding placement near radiators, air conditioners, windows, or exterior walls.
• Universal Post-Delivery Protocol:
  1. Keep the guqin in its closed shipping box for 24-48 hours to allow gradual temperature equalization.
  2. Open the box in a stable room and leave the guqin in its padded case for a further 5-7 days.
  3. Only after this period should you begin very gentle, incremental tuning to concert pitch over several days.

Critical Reminder: Rushing the acclimatization process or tuning too aggressively is the most common cause of post-shipping issues. Our team provides complimentary remote support during this critical phase.

Beyond the instrument's price, please consider these potential expenses:

Shipping Terms (Incoterms): We typically quote and ship under DAP (Delivered At Place) terms, meaning we deliver to your address and pay for international freight, while you are responsible for import duties and taxes. DDP (Delivered Duty Paid) service, where we handle and pre-pay all charges, is available for a fee and upon request for most destinations.

Transparency: During your initial quote, we will provide a detailed cost breakdown with our best estimates for these ancillary fees based on your delivery address.

We employ a military-grade, multi-layered packaging system and partner exclusively with global logistics specialists in fragile goods transport.

• Our Packaging Protocol:
  1. Instrument Preparation: Strings are loosened, and the guqin is wrapped in acid-free tissue and a soft cotton cloth.
  2. Custom Molded Core: It is placed in a rigid, precision-cut foam shell that cradles every contour, suspending it within the outer case.
  3. Climate Control: Humidity-buffering packets (e.g., Boveda) are added based on the destination's climate profile.
  4. Armored Outer Crate: The foam core is secured inside a double-walled, wooden or heavy-duty polyethylene flight case with reinforced corners.
  5. Clear Labeling: The case is marked with "FRAGILE - MUSICAL INSTRUMENT," "THIS SIDE UP," and handling icons in multiple languages.
• Logistics Partners: We use DHL Express, FedEx International Priority, or dedicated fine art shippers for utmost reliability and real-time tracking.
• Insurance: Full "door-to-door" insurance is mandatory for all international shipments and is included in our shipping quote.
• Damage Protocol - A Step-by-Step Guide:
  1. Immediate Documentation: If the outer packaging shows visible damage (dents, punctures, water stains), photograph it thoroughly before the courier leaves and have them note the damage on the delivery receipt.
  2. Recorded Unboxing: We advise filming the entire unpacking process as potential evidence for a claim.
  3. Initial Assessment: Carefully inspect the guqin. Photograph any damage from multiple angles.
  4. Contact Us Immediately: Email us the photos/videos and a description within 24 hours of delivery.
  5. Claim Initiation: We will immediately file a claim with the carrier/insurer on your behalf and guide you through the process.
  6. Resolution: Depending on the assessment, options range from a professional repair (by us or a vetted local expert) to, in rare cases of total loss, the creation of a replacement instrument.

In over 15 years of global shipping, our damage rate is less than 0.3%. The vast majority of issues are minor and fully reparable.

We have built a globally distributed client services team to provide seamless support.

• Follow-the-Sun Coverage:
  • Our primary workshop and Asia-Pacific team operates on China Standard Time (UTC+8).
  • Our European liaison (based in Germany) covers Central European Time (UTC+1/CET).
  • Our North American representative (based on the US East Coast) covers Eastern Time (UTC-5/EST).
  • This ensures a 16-hour combined service window on business days for urgent inquiries.
• Language Capabilities:
  • Primary Service Languages: English and Mandarin Chinese.
  • Additional Support: Dedicated staff for Japanese, Korean, German, and French. For other languages, we engage professional translation services for key communications.
  • Translated Documentation: Contracts, manuals, certificates, and key instructions are provided in your preferred language.
  • Technical Glossary: We provide a bilingual glossary of guqin-specific terms to ensure precise communication.
• Communication Protocols:
  • We use your preferred channels: Email, Zoom, Microsoft Teams, WhatsApp, WeChat, etc.
  • All significant decisions and specifications are confirmed in writing via email.
  • Meetings are scheduled with agendas, and minutes are shared afterward.
• Cultural Awareness: Our international team is trained in cross-cultural communication, understanding different expectations regarding formality, decision-making, and feedback.

At the project kick-off, we agree on a communication plan detailing preferred methods, frequency, and primary contacts.

We offer comprehensive partnership programs for organizations:

• Volume Discounting: 5+ instruments: 5% discount; 10+: 10%; 20+: 15%; 50+: Custom pricing.
• Dedicated Institutional Account Manager: A single point of contact familiar with procurement processes and educational/cultural needs.
• Custom Branding & Standardization: Options for institutional logos, serialized numbering, and standardized tonal profiles across a fleet.
• Flexible Financing: Staged payments, quarterly billing, annual procurement agreements, and net terms for established institutions.
• Educational Support: Complimentary teacher training workshops (online or on-site), curriculum resources, and teaching guides.
• Maintenance Agreements: Annual or multi-year service contracts for priority support and discounted repairs.
• Co-Branding & Promotion: Opportunities for joint events, concerts, masterclasses, and co-marketing.
• Logistics & Inventory Management: Staggered delivery schedules, multi-destination shipping, and instrument storage/holding services.
• Project Collaboration: Partnership on research initiatives, cultural exhibitions, and intangible cultural heritage (ICH) preservation projects.

Educational institutions may qualify for our Educational Grant Program. Non-profit cultural organizations can apply for Cultural Heritage Support Pricing. A full Institutional Partnership Proposal is available upon request.

Classroom instruments must prioritize durability, consistency, safety, and pedagogical utility.

• Tonal and Tactile Consistency: Instruments within a batch are carefully matched for similar volume, response, and string action height to facilitate group teaching and fair student assessment.
• Enhanced Durability Features:
  • Reinforced construction at high-stress points (bridge, nut, tuning peg holes).
  • Use of especially hard-wearing materials for friction surfaces.
  • Extra-robust lacquer finish to withstand frequent handling.
• Safety-First Design: All edges are carefully rounded; finishes are non-toxic; there are no small, detachable parts that could pose a choking hazard.
• Ease of Maintenance: Design simplifies daily cleaning and basic upkeep. Maintenance guides are provided with clear, multilingual diagrams.
• Asset Identification & Management:
  • Each instrument receives a unique serial number and optional institutional engraving.
  • Optional Digital Management: Each guqin can be fitted with a QR code or RFID tag linked to a digital passport containing its specs, service history, and care instructions.
  • We can provide or integrate with cloud-based asset management platforms for easy inventory tracking.
• Standardized Accessories: Uniform bags, stands, and tuners streamline storage and classroom logistics.
• Tiered Instrumentation: Offering different grades (e.g., "Foundational," "Intermediate," "Advanced") for different program levels can be cost-effective.
• Value Engineering: We work with institutions to identify where standardization and selected materials can reduce cost without sacrificing core quality for the teaching environment.

We offer a "Scholar Series" Education Package that bundles instruments with teacher training, maintenance workshops, and optional curriculum consulting.

Exhibition guqins serve as both art objects and cultural artifacts, demanding exceptional standards in preservation, display, and documentation.

• Preservation as Priority:
  • Material Inertness: Selection of woods and finishes that are chemically stable and will not off-gas, protecting both the instrument and neighboring artifacts.
  • Environmental Pre-Adaptation: The instrument is meticulously conditioned to thrive in standard museum climate conditions (typically 20°C ±2°C, 50% RH ±5%).
  • Archival-Quality Materials: All adhesives, lacquers, and inlays are chosen for long-term stability.
• Display-Centric Aesthetics:
  • Visual Impact: Emphasis on superlative craftsmanship, exquisite lacquer work, and historically significant or artistically striking designs.
  • 360-Degree Presentation: The back of the instrument (often decorated with inscriptions and seals) is finished with the same care as the front, as viewers may circulate around it.
  • Lighting Compatibility: Finishes are designed to minimize glare under exhibition lighting while showcasing texture and depth.
• Security & Interaction:
  • Secure Mounting: Design and provide custom-fitted, discreet display mounts that safely immobilize the instrument.
  • Playability Consideration: If the piece is to be occasionally played for demonstrations, this is factored into the design from the outset to balance conservation needs with functionality.
  • Exhibition Replica Option: For ultra-rare or fragile originals, we can create high-fidelity, playable replicas for display, allowing the original to remain in controlled storage.
• Comprehensive Documentation:
  • Provision of a detailed "Artist's Statement" and technical dossier suitable for curatorial files and exhibit labels.
  • Professional condition reports and high-resolution photography.
  • Collaboration on materials analysis (e.g., wood species identification) if required for acquisition.

We have experience collaborating with museums globally and can develop solutions tailored to specific exhibition narratives and conservation requirements.

Proper daily care is the foundation of your guqin's longevity and performance.

• Environmental Control:
  • Humidity: Maintain 40%-70% relative humidity (RH). Use a humidifier in dry climates/heaters, a dehumidifier in damp climates. Extreme dryness causes cracking; excess humidity promotes mold and swelling.
  • Temperature: A stable range of 15°C - 25°C (59°F - 77°F) is ideal. Avoid rapid fluctuations.
  • Avoid: Direct sunlight, air vents (heating/AC), damp basements, and the trunk of a car.
• Cleaning:
  • Lacquer Surface: Wipe gently with a soft, slightly dampened cotton or microfiber cloth. Never use chemical cleaners, alcohol, or abrasive cloths.
  • Strings: After playing, run a dry cloth along the length of each string to remove skin oils and moisture.
  • Dust Prevention: Keep the guqin in its bag or under a soft cloth when not in use.
• Playing Habits:
  • Wash and dry hands before playing.
  • Be mindful of long fingernails to avoid scratching the lacquer.
  • Tune slowly and gently to prevent string breakage or damage to the bridge/nut.
  • If not playing for an extended period (months), slightly loosen the strings to reduce tension on the body.
• Storage:
  • Always use the provided padded bag or a hard case for storage and transport.
  • Store horizontally on a stable surface or on a dedicated, sturdy guqin stand. Never lean it against a wall.
  • Never place objects on top of the instrument.

A detailed Care and Preservation Guide and a basic maintenance kit are included with every Sundayou guqin.

Many small problems can be remedied with simple, careful actions.

• Light Surface Scratches (in the clear coat only):
  • Assessment: The scratch has not penetrated to the colored lacquer or wood beneath.
  • Remedy: Apply a tiny amount of very fine polishing compound (e.g., >12,000 grit) or dedicated lacquer polish to a soft cloth. Rub gently along the direction of the scratch, then buff with a clean cloth. For micro-scratches only.
  • Never: Use sandpaper or abrasive pads, which will cause greater damage.
• Stiff or Squeaky Tuning Pegs (Zhen):
  • Cause: Low humidity causing wood-on-wood friction, or accumulated dust.
  • Remedy:
    1. Apply a small amount of specialized "peg compound" or a tiny pinch of pure talcum powder to the cylindrical shaft of the peg.
    2. Insert and turn the peg gently several times to distribute the lubricant.
    3. Important: Never use liquid oils or waxes, as they can damage wood and lacquer over time.
• String Grooving Too Deeply into Bridge or Nut:
  • Symptom: The string sinks into its groove, muting the sound and creating poor playing action. Over time, it can damage the wood.
  • Remedy: This requires professional adjustment. Contact us for remote guidance or a referral to a qualified local repair person. Do not attempt to file the bridge or nut yourself.
• Fine, Superficial Lacquer Crazing (Not Structural):
  • Symptom: A network of very fine lines in the lacquer, often after a sudden environmental change. The wood beneath is sound.
  • Remedy: This may be the beginning of natural "crackle" (Duanwen) formation or an environmental stress response. Stabilize the humidity around 50% and monitor. It usually does not affect sound or structure and can be considered part of the instrument's character. No repair is needed; focus on preventing further sudden changes.

Golden Rule: If you are unsure, always contact us first with clear photos or a video. Do not attempt repairs on structural issues, the soundpost, or large lacquer areas without professional guidance.

Regular professional maintenance, like servicing a fine watch, prevents major issues and ensures optimal performance.

• Monthly Self-Check: Visually inspect for obvious issues: check string tension, look for new cracks or open joints, ensure all parts are secure.
• Basic Service (Every 6-12 months):
  • Scope: Deep cleaning, inspection of string grooves for wear, peg lubrication, overall tuning stability assessment, minor adjustments.
  • Performed by: An experienced player or a local string instrument technician (with our guidance if needed).
• Comprehensive Check & Setup (Every 2-3 years):
  • Scope: Thorough structural inspection, assessment of internal soundpost (if accessible), repair of minor lacquer flaws, adjustment of bridge/nut height if worn, internal cleaning (by a specialist).
  • Performed by: A professional luthier or experienced guqin restoration specialist.
• Major Restoration or Refinishing (10+ years or as needed):
  • Triggers: Significant structural issues (severe warping, open joints), major lacquer damage, or a fundamental degradation of sound quality unaddressed by setup.
  • Process: May involve partial disassembly, re-gluing, local or complete refinishing, and component replacement. This is a significant undertaking in time and cost.

Factors Influencing Maintenance Frequency:

• Usage: A daily performance instrument needs more frequent check-ups than one played occasionally.
• Environment: Instruments in highly variable climates require more vigilant care.
• Instrument Grade: Performance and collector-grade instruments benefit from more regular, detailed maintenance.

We offer lifetime technical consultation for all our custom guqins and can often recommend trusted technicians in our international network. For regions without local expertise, we offer a mail-in repair service (clients are responsible for secure shipping both ways).

We select the optimal logistics solution based on destination, urgency, and client preference.

• Primary Shipping Partners:
  • Global Express Couriers: DHL Express, FedEx International Priority, UPS Worldwide. Ideal for most individual clients. Offers door-to-door tracking and speed (3-10 business days).
  • Air Freight + Local Delivery: Ship via air cargo to the nearest major airport, where a local agent handles customs clearance and final delivery. Cost-effective for larger or multiple items (7-20 business days).
  • Ocean Freight: For very large institutional orders (dozens of instruments) where time is less critical, sea freight offers significant cost savings (30-60 days transit).
  • Specialist Art & Antiques Shippers: Companies like Masterpiece International or Gander & White. Reserved for ultra-high-value pieces or complex exhibition logistics. Offers white-glove service and museum-grade packaging at a premium.
• Estimated Transit Times (from dispatch):

  Destination Region	Express Service	Air Freight + Delivery
  East Asia (Japan, Korea, Taiwan, HK)	2-4 business days	5-10 business days
  North America (USA, Canada major cities)	3-7 business days	7-15 business days
  Europe (Western Europe)	4-8 business days	10-20 business days
  Australia / New Zealand	5-9 business days	12-25 business days
  Other Regions (S. America, Africa, etc.)	7-15+ business days	15-30+ business days

• Tracking & Notifications: You will receive a tracking number and a link to monitor your shipment's progress in real-time. The carrier will typically notify you of the scheduled delivery day.
• Customs Clearance Delays: Please note that the times above do not include potential delays at the destination country's customs. We prepare all documents meticulously to expedite clearance, but occasional delays of 1-5 days can occur.

Proper receipt and unpacking are critical for identifying potential issues and protecting your rights.

1. Inspect External Packaging on Delivery:
   • Examine Immediately: Before the driver leaves, check the outer box for obvious damage: crushing, punctures, water stains, or severe deformation.
   • Document Any Damage: If issues are found, take clear photographs (including the shipping label) and ask the driver to note the damage on their handheld device or delivery slip. This is vital for any insurance claim.
   • Right to Refuse: You have the right to refuse delivery if the outer packaging is severely compromised. Please contact us immediately if this occurs.
2. Video Record the Unpacking (Strongly Recommended):
   • Start recording before opening the box. Continue filming uninterrupted until the guqin is fully removed and given a preliminary inspection.
   • Ensure the video clearly shows the condition of each layer of packaging and the instrument's state as it is revealed.
   • This video is powerful evidence if concealed damage is discovered.
3. Unpack Methodically:
   1. Open the Outer Case: Carefully cut the tape and open the outer shipping container.
   2. Inspect the Inner Foam Shell: Check the high-density foam mold for any cracks or compression damage.
   3. Lift Out the Inner Shell: Gently lift the foam shell (with the guqin inside) and place it on a soft, stable surface (e.g., a table covered with a blanket).
   4. Open the Foam Shell: Unfasten any straps and separate the two halves of the foam mold.
   5. Remove the Guqin: Using both hands, firmly support the body of the guqin at both ends (never lift by the tuning pegs or bridge alone) and lift it clear of the packaging.
4. Inspect the Instrument:
   • Overall Appearance: In good light, carefully examine the lacquer for any new scratches, dents, or cracks.
   • Structural Check: Ensure the bridge, nut, tuning pegs, and feet are firmly attached and undamaged.
   • String Check: Verify the strings are intact, without rust or breakage.
   • Accessory Inventory: Confirm all included items (bag, certificate, tools, etc.) are present.
5. If You Discover a Problem:
   • Minor Issues: For insignificant marks that don't affect structure or sound, please take photos and send them to us for our records. We may offer a small credit or discount on future services.
   • Significant Damage: For any clear damage (cracks, detached parts, major impacts), stop immediately. Take comprehensive photos and video from multiple angles and contact us right away. We will initiate the claims and resolution process.

We provide a detailed, illustrated unpacking guide. Please perform this initial inspection promptly (within 24 hours of receipt is ideal) and inform us of the outcome.

We offer a comprehensive and tiered warranty on all Sundayou custom guqins, reflecting our confidence in their quality.

• Warranty Periods:
  • Structural & Craftsmanship Warranty: 10 Years. Covers defects in materials and workmanship that affect structural integrity, such as glue joint failure, wood cracking (not caused by environmental neglect), or component detachment.
  • Lacquer Finish Warranty: 5 Years. Covers defects in the lacquer materials or application leading to bubbling, peeling, or abnormal cracking.
  • Accessories Warranty: 1 Year. Covers manufacturing defects in included items like the carry bag and strings (excluding normal wear and breakage).
• Warranty Coverage & Exclusions:
  • Covered: The above-listed defects arising under normal use and recommended care conditions.
  • Not Covered:
    • Damage from accidents, impacts, falls, misuse, neglect, or acts of nature (fire, flood, etc.).
    • Issues resulting from failure to follow care instructions (e.g., exposure to extreme humidity/temperature).
    • Normal wear and tear: string breakage, groove wear on the bridge/nut, finish wear from playing.
    • Damage caused by repairs or modifications performed by unauthorized personnel.
    • Minor, natural variations in appearance (e.g., wood grain patterns) that are not defects.
• Warranty Service Forms:
  • Remote Diagnosis & Guidance: Provided free of charge.
  • Repair:
    • For valid warranty claims, we cover the cost of parts and labor.
    • Client Responsibility: The cost to ship the guqin to and from our designated repair center, including insurance and any applicable import/export duties.
  • Replacement: In cases of irreparable defects or major issues early in the warranty period, we may replace the instrument with one of equivalent grade, subject to mutual agreement.
• Warranty Claim Process:
  1. Notify us via email or client portal with your order number, a description, and clear photos/video.
  2. We will conduct a remote assessment to determine if the issue is warranty-related.
  3. If covered, we will agree on a repair or resolution plan.
  4. We will guide you through the safe packing and shipping process to our workshop.

The warranty period begins on the date of delivery to your specified address. Please keep your sales invoice and warranty certificate safe.

We provide lifetime technical support for all Sundayou guqins. Professional repair services remain available post-warranty.

• Service Process: Similar to the warranty process: contact us, we assess the issue remotely and provide a service quotation.
• Cost Components:
  • Diagnostic Fee: For complex post-warranty assessments, a nominal remote diagnosis fee may apply (e.g., $50 USD), often waived if you proceed with the recommended repair.
  • Labor: Based on the complexity and hours required for the repair.
  • Parts & Materials: Cost of any replacement components (e.g., a new bridge, specific wood).
  • Shipping & Duties: The client is responsible for all shipping costs to/from the repair center and any associated taxes/duties.
• Indicative Price Guide for Common Services (Labor + Parts only, excludes shipping):

  Service	Approximate Cost Range	Notes
  Full Set of Strings Replacement	$50 - $400+	Depends heavily on string type (Standard vs. Pure Silk vs. Luxury Alloy)
  Bridge/Nut Groove Repair	$100 - $350	May involve filling and re-cutting, or adding a protective insert
  Localized Lacquer Repair (small area)	$200 - $800	Cost varies with damage extent and complexity of the original finish
  Regluing a Joint (localized)	$150 - $500	Requires assessment of location and accessibility
  Comprehensive Check & Setup	$200 - $600	Includes cleaning, lubrication, tuning stability optimization, minor adjustments

The above are estimates. A formal quotation based on your specific needs will always be provided before any work begins. We are committed to fair and transparent pricing.

Our craftsmanship and cultural role are recognized through multiple prestigious accreditations.

• International Recognition:
  • UNESCO Intangible Cultural Heritage: The art of the Guqin was inscribed on the UNESCO Representative List in 2003.
  • ISO 9001:2015 Quality Management System: Certification ensuring consistent, high-standard production processes.
  • Forest Stewardship Council (FSC) Certification: For sustainable and ethical wood sourcing.
• National Certifications & Honors (China):
  • National Intangible Cultural Heritage Bearer Unit: Recognized as a group for Guqin art (Jinling School).
  • Chinese National Musical Instrument Craftsmanship Certification: Awarded by the China Musical Instrument Association.
  • Time-Honored Brand Recognition: Accreditation for brands with a century-old heritage of craftsmanship.
  • National Cultural Export Key Enterprise: Designated by multiple ministries for promoting Chinese culture globally.
• Industry Awards:
  • Gold Medal, China Musical Instrument Craftsmanship Competition (three consecutive sessions).
  • Best Craftsmanship Award, International Folk Musical Instrument Expo.
  • Cultural Heritage Protection & Innovation Award.
• Master Artisan Credentials:
  • 2 National-Level ICH Representative Inheritors .
  • 3 Provincial-Level Masters of Arts & Crafts .
  • 8 Holders of Senior Guqin Maker Qualifications.

Copies or verification details for these certifications can be provided upon request. Institutional partners receive a complete certification portfolio.

We are deeply committed to safeguarding, transmitting, and innovating within the guqin tradition through active, multifaceted programs.

• Transmission of Craft :
  • Maintaining a formal "Master-Apprentice" system to train the next generation of luthiers.
  • Partnering with conservatories and arts universities to establish accredited guqin-making programs.
  • Hosting public workshops and open days to demystify the craft.
• Research & Documentation:
  • Participating in national-level research projects on historical guqin literature and techniques.
  • Sponsoring archaeological research and contributing to the restoration of antique instruments.
  • Building a digital archive of craftsmanship videos, interviews with elders, and 3D scans of significant instruments.
• Education & Outreach:
  • Donating student-grade instruments and supporting guqin programs in primary and secondary schools.
  • Organizing international cultural exchange events and concert series.
  • Developing free online learning resources for basic guqin appreciation and playing.
• International Dialogue:
  • Collaborating with UNESCO and other global bodies on ICH safeguarding projects.
  • Partnering with world-renowned museums on thematic exhibitions.
  • Establishing overseas cultural centers focused on guqin music and philosophy.
• Sustainable Practice:
  • Managing dedicated wood plantations for future tonewood supply.
  • Investing in R&D for eco-friendly lacquer alternatives.
  • Operating a "One Guqin, One Tree" reforestation initiative.

We welcome partnerships with institutions and individuals who share our passion for preserving this profound element of human creativity.

The guqin's sound is unique, often summarized by the classical aesthetic principles of "Qing (清), Wei (微), Dan (淡), Yuan (远)"—Clarity, Subtlety, Spareness, and Profundity.

• Core Tonal Attributes:
  • Clarity (清): A pure, transparent sound free of buzz or distortion, where each note is distinct.
  • Subtlety (微): An immense range of nuanced expression within a soft dynamic, with long, intricate decays.
  • Spareness (淡): A restrained, elegant quality that is expressive without being forceful or overtly emotional.
  • Profundity (远): A sense of spatial depth and timeless resonance that seems to linger in the air and mind.
• Timbral Layers by Playing Technique:
  • Open String Tone (San Yin): The foundational sound—deep, resonant, and stable, likened to the earth.
  • Stopped String Tone (An Yin): Produced by pressing the string to the board—infinitely variable, expressive, and vocal in quality.
  • Harmonic Tone (Fan Yin): Clear, bell-like, and ethereal, likened to the heavens.
• Guidance on Tonal Selection:

  Tonal Profile	Characteristics	Suited For	Recommended Wood
  Deep & Resonant	Rich bass, complex overtones, long sustain	Grand ancient pieces like "Guangling San," "Xiaoxiang Shuiyun"	Aged Chinese Fir, Rosewood
  Clear & Articulate	Bright treble, precise note definition, good projection	Lyrical literati pieces like "Meihua Sannong," "Yangguan Sandie"	Paulownia, Catalpa
  Balanced & Versatile	Even response across all registers, adaptable	General study, teaching, diverse repertoire	Aged Chinese Fir, Composite tops
  Distinctive Character	Unique, personalized voice with specific color	Contemporary composition, experimental music	Special wood pairings or treatments

• Methods for Evaluation:
  • Remote Sound Samples: We can provide high-quality recordings of instruments made with similar woods and specifications.
  • In-Person Trial: You are welcome to visit our workshop or affiliated showrooms to play instruments firsthand.
  • Expert Description: Our luthiers provide detailed verbal portraits of an instrument's sonic personality.

Tone selection is deeply personal. We provide expert counsel, but the final choice should resonate with your artistic sensibility and the music you wish to create.

The guqin's design is a masterpiece of ancient acoustic engineering, profoundly influencing its expressive capabilities.

• Principles of the Resonance System:
  • Chamber Design: The arched top plate and flat bottom plate create a shallow, complex cavity that amplifies and colors the string vibrations.
  • Soundpost Configuration: The positions and dimensions of the "Celestial Pillar" (Tian Zhu) and "Earthly Pillar" (Di Zhu) inside the body are meticulously calculated to balance vibration modes and tune the cavity's response.
  • Lacquer as Acoustic Element: The natural lacquer finish provides a specific mass and damping quality, crucial in controlling the attack, sustain, and timbral warmth.
• Acoustic Properties:
  • Vibration Modes: The thin top plate vibrates in sophisticated patterns, generating a rich spectrum of overtones that give the guqin its complex, "noisy" yet beautiful sound.
  • Frequency Emphasis: Its response is strongest in the mid-range frequencies most sensitive to the human ear, facilitating subtle expression.
  • Decay Characteristic: The sound decays slowly but not indefinitely, allowing for the "lingering flavor" (yùn wèi) essential to Chinese musical aesthetics.
• Design Factors Affecting Playability & Sound:
  • Bridge (Yueshan) Height: Directly affects string action. Too high makes stopping difficult; too low causes buzzing.
  • Nut (Longyin) Curvature & Material: Impacts tone purity and the ease of sliding techniques (游吟).
  • Body Thickness & Camber: Influences volume, resonance, and the balance between fundamental and overtone presence.
  • Lacquer Thickness & Hardness: A thicker lacquer tends to produce a more muted, ancient tone; thinner lacquer yields a brighter, more responsive sound.
• Modern Acoustic Optimization:
  • Laser Vibrometry: To visualize and analyze the vibration patterns of the soundboard under different excitations.
  • Finite Element Analysis (FEA): Computer modeling to predict and refine the structural behavior of the resonance chamber.
  • Material Acoustic Testing: Laboratory measurement of wood properties like speed of sound and damping ratio to inform selection.
  • Performance Validation: Collaboration with master players to subjectively evaluate and fine-tune instruments during the final voicing stage.

We harmonize centuries of empirical knowledge with contemporary science to create instruments that honor tradition while offering refined, reliable performance for today's musicians.