Quality control in China: how a pre-shipment inspection works

You can pick the supplier perfectly and negotiate a good price — and still receive defects if you skip quality control. A pre-shipment inspection is the step that turns “I hope it’s fine” into “verified, shipping.” Let us break down how it works.

Why you must check before shipment

The main rule: quality is checked in China, before the cargo leaves. The reason is simple — if defects surface at your warehouse, fixing them is already late and expensive: the goods have to be returned halfway around the world, or you accept the loss.

When the inspection happens at the factory before shipment, you have leverage: the final payment and the shipment itself are tied to the inspection result. The factory is motivated to fix the findings.

Types of quality control

• Raw-material control — before production starts, to confirm the declared material is used.
• During-production control (DUPRO) — at the stage when 30–50% of the batch is done. It catches a systemic error before it is repeated across the whole batch.
• Pre-shipment inspection (PSI) — the final check of the finished batch before shipment. The most common and important type.
• Loading supervision — verifying that exactly the right goods, in the right quantity, go into the container.

For most orders a pre-shipment inspection is enough; for complex or large ones, add a during-production check.

What exactly is checked

A pre-shipment inspection covers:

• Quantity and completeness — matching the spec and the order.
• Appearance and quality — defects, chips, scratches, upholstery/coating flaws.
• Dimensions and materials — against the brief.
• Colour and tone — by sample or code.
• Functionality — for mechanisms, hardware, appliances.
• Packaging and labelling — will the goods survive transit.

How to read a photo report

A good inspection report is not three “all good” pictures but a structured document:

1. General batch photos — scale, number of packages.
2. Per-item photos — each key item separately.
3. Macro shots of problem areas, if any.
4. Measurements — photos with a measuring tool.
5. Conclusion — pass / fail, with a list of findings.

If the report has only general views and no detail, that is a reason to request a more thorough check.

The acceptance standard: AQL

A professional inspection relies on the AQL (Acceptable Quality Limit) standard — an acceptable defect level agreed in advance: how many minor, major and critical defects are allowed per batch. This removes the “is it a defect or not” dispute — the criteria are fixed before the check.

What to do if defects are found

• Minor defects — the factory fixes them before shipment.
• A systemic problem — rework of the batch or part of it at the manufacturer’s cost.
• Critical defects — no shipment until corrected; the final payment is held.

This is exactly why the “inspection + staged payment” pairing matters so much: it gives real leverage, not just promises.

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Want to be sure of quality before shipment? We run inspections at the production site with a photo report for each item — you see exactly what is leaving for you, before it ships from China.