Quality Inspection in China: A Buyer’s Guide

About this guide. This is general information based on our work as a sourcing agent in Guangzhou, not legal, tax or customs advice. Requirements depend on the product and destination and change over time; confirm them with the relevant authority, your customs broker or a qualified adviser before ordering.

Problems found in China are cheap to fix. The same problems found in your warehouse are expensive, slow and sometimes unrecoverable. Quality inspection is the set of checks that moves problem discovery back to the factory, while the goods are still there and the balance payment has not been made.

Types of inspection

• Pre-production check. Confirms materials and components match the approved specification before the line starts. Useful for custom products and first orders.
• During-production inspection. Carried out when a portion of the order is complete. Catches systematic problems early enough to correct them for the rest of the run.
• Pre-shipment inspection. The most common check. Performed when the order is finished and packed, against a sampling plan, before release for shipment.
• Container loading supervision. Confirms quantity, packaging and loading condition as the container is sealed.

What a pre-shipment inspection covers

• Quantity — cartons and units counted against the order.
• Workmanship — visual defects classified as critical, major or minor according to a checklist agreed in advance.
• Specification — dimensions, weight, materials, colour and finish compared with the approved sample.
• Function — product-specific tests such as switching on, charging, load, fit or assembly.
• Packaging and labelling — retail packaging, barcodes, inserts, carton markings and any market-specific labelling you specified.
• Shipping marks and carton strength — where relevant, a drop test on the export carton.

AQL sampling, briefly

Inspectors do not check every unit. They draw a random sample using the AQL (Acceptable Quality Limit) sampling plans in ISO 2859-1 (current edition 2026) and count defects by class. Buyers often specify that no critical defects are accepted, and separately choose AQL levels for major and minor defects; 2.5 for major and 4.0 for minor are common starting points for consumer goods, but there is no universal standard. The inspection level and acceptance criteria depend on the product, the risk it carries and the inspection plan you agree. The important thing is to agree the levels and the defect definitions with the supplier before production, so the inspection result is not a surprise to either side.

Typical quality checks differ by product; we list them for each of our product categories, from electronics to furniture and building materials.

The inspection report

A useful report states the sampling plan, the number of defects found by class, photographs of each defect type, measurements against specification, and a clear result: pass, fail or pending. Reports that only contain photographs of good units tell you little. Ask for the raw findings, not a summary.

When goods fail

1. Do not release the balance payment until the issue is agreed.
2. Establish whether the defect is systematic (process) or isolated (handling). This changes the remedy.
3. Agree corrective action in writing: rework, replacement, sorting at the factory, or a price adjustment where the defect is acceptable to you.
4. Re-inspect after rework. A second inspection is far cheaper than a customer return.

Where the contract references the approved sample and the agreed AQL, these conversations are short. Where it does not, they are long.

Who should inspect?

Factory self-inspection is useful but not independent. Third-party inspection companies provide standardised reports at a per-day rate. A sourcing agent who has managed the order can combine inspection with problem-solving, because they already know the supplier, the sample history and what you care about. For high-value or safety-critical goods, laboratory testing of samples from the batch may be appropriate in addition to visual inspection.

How Flawless Effect helps

Our quality inspection service checks production and finished goods against your agreed specification and sampling plan, with a photo report before anything is loaded, and coordinates corrective action with the factory where issues are found. Inspection works best when the approved sample and defect definitions are agreed at the start, which is how we set up every project.

Frequently asked questions

Official sources and further reading

• ISO 2859-1:2026, Sampling procedures for inspection by attributes — Part 1 — the current edition of the AQL sampling standard
• GOV.UK: placing manufactured goods on the market in Great Britain — importer duties