We've seen all of these. Sometimes from new buyers trying China for the first time. Sometimes from experienced importers who got comfortable and stopped following the basics. The result is always the same: a shipment that arrives wrong, late, or not at all.
What's frustrating is that every one of these mistakes is avoidable. They don't require special expertise or expensive tools — just a few deliberate steps that take far less time than dealing with the fallout when things go wrong.
Mistake #1: Choosing a Supplier Based on Price Alone
The cheapest quote is almost never the right choice in China sourcing. This doesn't mean you should overpay — competitive pricing is one of the main reasons businesses source from China in the first place. But when a supplier quotes you 40% below the market rate, they're telling you something.
Either they're planning to use inferior materials, they're quoting a product spec they can't actually deliver, or they're a trading company inflating margins with no real factory to back them up. Sometimes all three.
What to do instead: Get quotes from at least 3–5 suppliers. Throw out the highest and lowest outliers. For suppliers quoting significantly below the rest, ask specifically what materials they're using, what their production process looks like, and whether they can provide product certificates. The answers (or non-answers) will tell you a lot.
Mistake #2: Skipping Product Samples
This one surprises people most when it goes wrong, because it feels so obvious in hindsight. A buyer finds a supplier, agrees on a price, places a bulk order — and is shocked when the goods arrive looking nothing like the product photos on Alibaba.
Product photos on supplier listings are marketing material. They show the best version of the product, often from a different factory. The only way to know what you'll actually receive is to hold a physical sample made to your specification.
What to do instead: Always order samples before committing to production. Test them properly — not just visually, but against your spec sheet. Check dimensions, weight, materials, and function. If anything is off, document it clearly and ask for revised samples before you approve production.
Note: "Production will be better than the sample" is one of the most common things unreliable suppliers say. If the sample isn't right, production won't magically fix it — it will replicate the problem at scale.
Mistake #3: No Written Contract or Purchase Order
Verbal agreements and WhatsApp conversations are not contracts. If your order goes wrong and you need to hold a supplier accountable, the first thing anyone will ask is: what did your purchase order say?
A proper purchase order should specify: product description, materials, dimensions and tolerances, quantity, unit price, payment terms, production timeline, shipping terms (Incoterms), quality standards, and consequences for defects or late delivery. It's not a legal document that requires a lawyer — it's a written record that both parties agreed to specific terms.
What to do instead: Issue a written PO for every order, no matter how small. Have the supplier confirm it in writing — an email reply saying "confirmed" is sufficient. For large or complex orders, consider a formal supply agreement.
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Chat on WhatsApp →Mistake #4: Paying 100% Upfront
Standard payment terms in Chinese manufacturing are a 30% deposit before production starts and 70% before the goods are released for shipment. This structure protects both parties: the supplier has some commitment from you, and you retain leverage until you've confirmed the goods are ready.
Paying 100% upfront removes all of your leverage. Once they have the money, your urgency drops considerably in their priority queue. If the goods come out wrong, recovering a full payment is much harder than simply withholding a final payment.
What to do instead: Stick to 30/70 as a baseline. For first-time orders with a new supplier, some buyers prefer 50/50 — that's reasonable too. If a supplier insists on 100% upfront, that's a significant red flag and worth walking away from.
For a full breakdown of how payments work — T/T, Letter of Credit, Trade Assurance, and how to protect your deposit — see our guide to China payment terms.
Mistake #5: Skipping the Pre-Shipment Inspection
This is the most expensive mistake on this list, because by the time you discover a quality problem without a pre-shipment inspection, the goods are already on a ship or in your warehouse — and your options are limited and costly.
A pre-shipment inspection (PSI) is conducted when production is complete and goods are packed and ready to ship. An inspector — either your own team, your sourcing agent, or a third-party inspection company — physically checks a sample of the order against your product specs and approved samples.
Problems caught before the container is sealed are fixable. Problems discovered at your warehouse are a dispute, a rework cost, and potentially a lost customer.
What to do instead: Budget for a pre-shipment inspection on every significant order. The cost is typically $200–400 for a one-day inspection. Compared to a bad shipment worth $15,000 — or the cost of a customer return — it's one of the best investments in your supply chain.
When to inspect during production too: For large orders or products with tight tolerances, a during-production (DUPRO) inspection is also worth considering. This catches problems while there's still time to correct them before production is complete.
The Common Thread
All five of these mistakes come down to the same thing: cutting corners on the process to save time or money — and paying for it later at a much higher cost. The irony is that the steps that prevent these mistakes are not expensive or time-consuming. They just require discipline.
If you're new to sourcing from China and want to avoid these pitfalls, working with a local sourcing agent for your first few orders is often the fastest way to get it right — and build the experience to do it confidently on your own later.
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