How to verify a Chinese factory before you pay.
A working checklist — what to check, in what order, and which red flags actually predict a failed order.
Short answer: verify in this order — company registration, factory-vs-trader status, production capability on your specific process, certificates against physical goods, then sample quality. Most failed orders trace back to a step skipped in the first two weeks, not to bad luck late in production.
| Step | What it proves | Time / cost |
|---|---|---|
| 1. Registration lookup | The company legally exists, in this scope, since this date | 10 min, free |
| 2. Factory or trader | Who you are actually buying from | Same day, free |
| 3. Capability check | That this process can hold your tolerance | Half a day on site |
| 4. Certificates vs goods | That the paperwork describes what ships | 1–2 days, free |
| 5. Sealed sample | What "acceptable" means in writing | 1–3 weeks |
1. Company registration — ten minutes, free
Every Chinese company has a unified social credit code. Look it up on the National Enterprise Credit Information Publicity System or any commercial lookup, and check three things: when the company was registered (a factory claiming twenty years of experience that registered last year is a red flag), the registered scope (it should include manufacturing or the exact trade of your product), and any legal cases or abnormal-operation records.
2. Factory or trading company — decide, don't guess
Neither is automatically bad. A trading company is fine when it adds real services. What matters is that you know which one you are dealing with, because the price structure and the accountability are different. Practical checks: the business licence scope, whether the address on the licence is an industrial zone or an office tower, and what the nameplate on the workshop says when someone is actually standing there.
3. Capability on your process, not capability in general
A factory visit that produces workshop photos proves nothing about your order. What proves capability: the machine that will run your product, running, with your material in it; the QC station and its instruments; the welding or finishing standard on a current order similar to yours. If you cannot visit, a video call walk-through following a fixed list is far better than a slideshow, and a third-party audit report covers the rest.
4. Certificates must match the goods, not the brochure
The most common failure in building materials: valid-looking certificates for a product variant that is not the one being shipped. Check that the test report's model, batch date and manufacturer name correspond to the quotation, and that the report is less than the standard's validity window. For anything load-bearing, fire-rated or in contact with drinking water, insist on a current third-party report — not a factory self-declaration. Where your market requires a management-system certificate, check it on the certification body's own register rather than accepting a scanned PDF, and for quality-management systems refer to the ISO 9001 standard.
5. Sample discipline
Samples prove what the factory can do when it is trying. Production proves what it does when it is busy. So: keep a sealed reference sample, photograph it with dates, write the agreed specification — materials, tolerances, finish, packaging — into the production contract, and inspect against that document before the balance payment moves. A golden sample without a written specification is an opinion, not a standard.
Red flags that actually matter
Price dramatically below the other quotes with no explanation. A factory that resists a video walk-through but offers beautiful certificates. A different beneficiary name on the bank account than on the business licence. Quotations that arrive in minutes for a custom product. Any one of these alone is not disqualifying; two together usually are.
Common questions
Do I need to visit the factory in person?
+Not always — but somebody who represents your interests should. For a first order of custom goods, either you go, or an agent who is accountable to you goes, or you commission a third-party audit. Relying on the factory's own photos and videos is the option that fails most often.
Is a business licence enough proof the supplier is real?
+It proves the company exists and is registered for that scope. It proves nothing about whether the workshop can make your product. Licence, capability check and sample discipline answer three different questions; you need all three.
What does a factory audit cost?
+Third-party audit firms in China typically charge US$250–450 for a one-day audit with a report. A sourcing agent's own visit is often included in the service fee. Compare both numbers against the order value — on a US$15,000 order, a US$300 audit is cheap insurance.
Read next
一句话结论：按这个顺序核实——工商注册、工厂还是贸易公司、能不能做您这个工艺、证书和实物是否一致、最后才是样品。大多数翻单，都出在头两周跳过的那一步，而不是生产后期的运气。
| 步骤 | 证明什么 | 耗时 / 成本 |
|---|---|---|
| 1. 查工商注册 | 这家公司在法律上存在、有这个经营范围、成立于何时 | 10 分钟，免费 |
| 2. 工厂还是贸易商 | 您实际在向谁买货 | 当天，免费 |
| 3. 能力核查 | 这个工艺能不能守住您的公差 | 现场半天 |
| 4. 证书对实物 | 文件描述的是不是发出去那批货 | 1–2 天，免费 |
| 5. 封样 | 「合格」这个词在书面上到底指什么 | 1–3 周 |
1. 工商注册——十分钟，免费
每家中国企业都有统一社会信用代码。在国家企业信用信息公示系统或任意商业查询平台查三件事：注册时间（自称二十年经验、去年才注册的，要警惕）；经营范围（应包含制造或您这个品类）；有无诉讼或经营异常记录。
2. 工厂还是贸易公司——判断，而不是猜
贸易公司不一定不好，有真实服务价值的贸易公司完全可用。关键是您得清楚自己在跟谁打交道，因为价格结构和责任归属都不一样。实操判断：看执照经营范围；看执照地址是工业区还是写字楼；看真正站在车间里时，铭牌上写的是谁。
3. 看的是做您这个工艺的能力，不是泛泛的「有实力」
一堆车间照片证明不了您的订单会怎样。能证明的是：将要生产您产品的那台机器，开着，里面装着您的材料；质检工位和检测仪器；在产订单上与您相近的焊接或表面处理水准。去不了现场，就按固定清单做一次视频连线看厂，比幻灯片强得多，其余交给第三方验厂报告。
4. 证书要跟货对上，不是跟画册对上
建材行业最常见的翻车：证书是真的，但对应的产品型号不是发货那款。核对检测报告的型号、批次日期、生产单位是否与报价单一致，报告是否还在标准有效期之内。承重、防火、涉水类产品，坚持要现行第三方报告，而不是工厂自检声明。项目要求体系认证的，到发证机构官网核验，不要只看扫描件；质量管理体系可对照 ISO 9001。
5. 打样纪律
样品证明工厂「认真时」能做成什么样，量产暴露它「赶工时」做成什么样。所以：留一份封样、拍照带日期；把谈定的规格——材料、公差、表面、包装——写进生产合同；尾款支付前，对着这份文件验货。没有书面规格的 golden sample 只是一个意见，不是标准。
真正要警惕的信号
报价比别家低一大截又说不清原因。不肯视频看厂，但证书美得像画册。收款账户户名和营业执照对不上。定制品的报价几分钟就发过来。单独一条不足以否决；两条同时出现，基本可以走了。
常见问题
一定要亲自去工厂吗？
+不一定——但得有代表您利益的人去。定制品首单，要么您去，要么对您负责的代理去，要么花钱请第三方验厂。只看工厂自己发的照片和视频，是失败率最高的选项。
有营业执照就能证明供应商靠谱吗？
+它只证明这家公司存在、注册了这个经营范围，证明不了车间能做出您的产品。执照、能力核查、打样纪律回答的是三个不同的问题，三个都要。
验厂一次要多少钱？
+国内第三方验厂公司一天审核加报告，通常 250–450 美元。代理自己的实地考察一般含在服务费里。两个数字都拿订单金额来比：一张 1.5 万美元的订单，花 300 美元验厂是很便宜的保险。