Short answer: Evaluate a Chinese manufacturer in sequence — lock your specifications, verify the legal entity, confirm production capability — and only then discuss pricing. Suppliers who cannot answer these three checks before a quote should not make your shortlist.
Define Product Specs, Tolerances, and Packaging Before Outreach
Vague requirements produce vague quotes. Write a specification pack your supplier cannot misinterpret:
- Product spec: materials with grades, dimensions, nominal weight, finish, color references (Pantone or a physical master sample), and function or safety tests the unit must pass.
- Tolerances: state each critical dimension with an allowable range, and label which dimensions are critical versus cosmetic. Unstated tolerances default to “whatever the factory does.”
- Packaging: retail carton artwork with dielines, poly bag and suffocation warnings where required, barcode and FNSKU placement, master carton dimensions and weight, and the drop-test standard you expect.
Risk: approving a sample without written tolerances leaves you with no objective basis to reject a production run. Next step: send the identical spec pack to every candidate so quotes are comparable line by line. If turning requirements into a factory-ready document is the bottleneck, Yoursender supports this through its project intake process.
Verify Legal Identity, Business License, and Export Experience
Match three documents against each other. A mismatch is an immediate stop signal, not a detail to resolve later.
| Document | What to verify | Red flag |
|---|---|---|
| Business license (营业执照) | Chinese legal name, unified social credit code, business scope covering your product category, establishment date | Scope excludes your product; very recent registration |
| Bank account details | Account holder name matches the license exactly | Deposits requested to a personal or third-party account |
| Export capability | Ability to issue commercial invoice, packing list, and certificate of origin; familiarity with your destination market | No export paperwork or unclear shipping terms |
Confirm whether you are dealing with a factory or a trading company. Both can work, but the commercial terms, price structure, and accountability differ — and you should know which one you are paying.
Assess Production Capability, Equipment, and Capacity
Ask for an equipment list with key machine types, the number of production lines, and which processes are in-house versus outsourced (plating, molding, printing, assembly). Then ask about capacity honestly: monthly output, current utilization, lead time for your order quantity, and how Chinese New Year and peak season affect scheduling.
Request a live video walkthrough of the lines that will run your order, not a marketing video. Tradeoff: larger factories offer stability but higher minimums and less flexibility; smaller workshops respond faster but carry capacity and continuity risk. Choose based on your order volume, reorder cadence, and how much process control you need.
Review Quality Management Systems and Process Controls
Ask how the factory prevents defects rather than how it handles them afterward. Request copies of their quality manual, inspection procedures, and any current certifications such as ISO 9001. Confirm which certification body issued them and whether the certificate covers the specific production site you plan to order from, not just the parent company.
Then trace the physical process. Ask where incoming raw materials are checked, who signs off on first-article approval, and at which stages in-process inspection occurs. A supplier that can describe sampling plans, defect classification, and corrective-action records is more likely to deliver consistently than one that only promises “100% inspection.”
Test Communication Quality and Technical Responsiveness
Before requesting a quotation, send a short technical question: a tolerance, a material substitution, or a packaging requirement. Note the response time, whether the answer addresses your actual question, and whether follow-up details arrive unprompted.
Pay attention to who replies. A sales representative relaying messages can slow every engineering change. Ask directly whether you will communicate with a technical contact for specification questions. Also test how the supplier handles a correction or an admission of uncertainty — a factory that says “we need to confirm” is often safer than one that answers everything instantly.
Validate Samples for Consistency, Materials, and Workmanship
Order a pre-production sample and compare it against your written specification, not against your memory. Check dimensions with your own instruments, confirm material grade from documentation or testing where feasible, and inspect finish, seams, and assembly at the specification’s stated level.
Request multiple units from the same run to see whether they match each other. Variation between samples signals unstable process control. Confirm the sample price and tooling terms before approving, and specify in writing that the approved sample becomes the reference standard for mass production.
After you have verified the factory’s legal status and production capabilities, the next layer of due diligence is documentation and IP protection. These two areas often determine whether a low-cost quote becomes an expensive mistake.
Confirm Certifications, Test Reports, and Compliance Documents
A PDF certificate is not proof. Ask for the original certificate and its corresponding test report, then verify the certificate number directly with the issuing body. Most major certification bodies provide online verification. Check that the certificate names the exact factory you are evaluating, not a trading company or a different facility. The product model and description must match your specifications. Test reports should come from an ISO/IEC 17025-accredited lab and reference the standard required for your target market. For Amazon sellers, confirm the report covers the specific ASIN or product variation.
| Document | What to verify | Red flag |
|---|---|---|
| Certification (e.g., UL, CE) | Certificate number, issuing body, factory name, product model, validity dates | Certificate names a different factory or a vague product description |
| Test report | Accredited lab, standard, test date, sample description, pass/fail criteria | Report is older than the current product design or tests a similar but not identical model |
| Compliance declaration (e.g., RoHS, REACH) | Supplier name, substances covered, date, signatory | Generic declaration with no traceable test data |
Decision criteria: If you cannot verify a certificate independently,
Clarify MOQs, Pricing, Payment Terms, and Lead Times
Ask for the MOQ per SKU, per color, and per component, not just a headline number. Confirm whether it applies only to the first order and whether it drops on repeats. A MOQ driven by fabric dye lots or custom tooling is negotiable in different ways than one driven by packaging.
Request a cost breakdown: material, labor, packaging, tooling, and margin. A supplier who will not break down cost is harder to negotiate with and harder to audit later. Lock the currency, the Incoterm (FOB and EXW are common), and how long the quote stays valid.
| Payment structure | Common use | Main risk to you |
|---|---|---|
| Deposit + balance before shipment | Small to mid-size orders | Paying the balance before you inspect |
| Letter of credit | Larger orders | Bank fees and document errors |
| Net terms after delivery | Established relationships | Rarely offered to new buyers |
Separate production lead time from sampling, inspection, and transit time. Get the deposit-clearing date in writing, since the clock usually starts then, not on the PO date.
Plan Pre-Shipment Inspection, Shipping, and Ongoing Audits
- Book inspection at 100% production and packing, before the balance payment. Use a third-party inspector with AQL-based sampling, and agree the defect definitions and checklist beforehand.
- Confirm logistics early. Verify who books freight under your Incoterm, approve carton marks, and require a packing list plus photos before the container leaves.
- Audit on repeat. For ongoing production, schedule periodic or unannounced inspections, keep a defect log, and track corrective actions to closure.
Tradeoff: inspections and audits add cost and days, but they are usually cheaper than rework, chargebacks, or a stranded listing.
Pre-Order Checklist
- MOQ confirmed per SKU, color, and component
- Cost breakdown and quote validity period received
- Incoterm, currency, and payment schedule in the contract
- Lead time split into production, inspection, and transit
- Sample approved and signed off as the golden sample
- Third-party inspection booked and checklist agreed
- Defect log and corrective-action process defined
FAQs
What is a normal MOQ for a first order?
It depends on the material and level of customization. Ask what specifically drives the number — raw material minimums, tooling, or setup time — because that tells you what is negotiable.
Should I pay a deposit before I see a sample?
Usually you pay a sample fee first, sometimes credited against the bulk order. Keep sample fees and production deposits as separate line items in your records.
Who should arrange the pre-shipment inspection?
You should, using an inspector you hire. A supplier’s internal QC report is useful context but should not be your only evidence.
Which Incoterm is best for a first order?
FOB is common because it splits responsibility clearly. EXW shifts export clearance and freight coordination to you, which is workable only if you have a capable forwarder.
How do I handle quality problems after delivery?
Document defects with photos and counts, compare them against the agreed checklist and AQL, and raise the claim within the window stated in your contract.
Conclusion
Evaluation does not end at the factory tour. It continues through pricing clarity, payment structure, inspection, and repeat-order auditing. Buyers who define these steps before the PO protect margin and avoid preventable delays. If you want structured support at each stage, start a sourcing project with Yoursender.
Planning a product or sourcing project? Discuss your sourcing project with Yoursender.