Resources
Everything we know about sourcing from China
Written by hardware engineers who audit factories and inspect shipments for a living — not marketers. Start with a guide, look up a term, or plan a sourcing trip around the right trade show.
The full 10-step path from your first inquiry to a delivered shipment — supplier sourcing, sampling, QC, and freight, with exactly what we do at each stage.
In-depth, 2,000–3,000-word walkthroughs on sourcing, QC, certification, and importing electronics from China.
Technical reference for components, certifications, and manufacturing processes — the engineering background behind a sourcing decision.
Plain-English definitions of sourcing, manufacturing, and trade terms — from MOQ and DFM to Incoterms and HS codes.
Upcoming electronics fairs by month and engineer-led sourcing tours — Canton Fair, Global Sources, factory visits, and Huaqiangbei runs.
Real sourcing projects with numbers — order size, defect rates, timelines, and what we would do differently.
Honest comparisons — sourcing agent vs Alibaba, vs Hong Kong traders — to help you pick the right route to a factory.
Straight answers on pricing, MOQs, lead times, safety, payment terms, and how working with us actually works.
Free calculators for hardware buyers — start with the import tariff and landed-cost calculator for US and EU duty, VAT, and de-minimis.
Where to start
If you have never sourced from China before, read How to Source Electronics from China first — it walks the full path from a spec to a shipped order. If you already have a supplier and want to avoid a bad batch, the Factory Audit Checklist is the fastest way to spot a trader posing as a factory.
How these sections fit together
The Guides are long-form playbooks — sourcing, quality control, certification, importing. The Wiki is for looking up one specific thing: a component, a certification like FCC or CE, a manufacturing process. The Glossary explains the jargon (MOQ, DFM, Incoterms) in plain English. Trade Shows lists upcoming fairs by month so you can plan a sourcing trip, and the Case Studies show real projects with real numbers — order size, defect rate, timeline.
Everything here is written by the same engineers who run the audits and inspections, so it reflects what actually happens on a factory floor, not a marketing brochure. If you can’t find an answer, the FAQ covers the questions buyers ask most — and you can always ask us directly.
Guides: the deep dives
The guides are where we unpack one topic properly. A guide like How to Source Electronics from China covers supplier discovery, RFQ structure, sample evaluation, factory audits, payment terms, quality control, and logistics — with checklists you can copy into your own workflow.
Other guides focus on narrower problems. The CE and FCC certification guide explains when you need which mark, what testing costs, and how long it really takes. The factory audit checklist breaks a half-day audit into 47 questions across production, quality, and documentation. The electronics quality control guide shows how to set AQL levels, write an inspection plan, and read a QC report.
Most guides are 2,000–3,000 words and include concrete numbers: typical sampling fees ($300–800), common defect rates (2–8% for new suppliers), audit costs ($350–600 per day), and certification timelines (4–12 weeks depending on the product).
Recent additions include market-specific import guides for Canada, Australia, New Zealand, Brazil, Mexico, Nigeria, and South Africa, plus ranked lists of the top smart home device manufacturers and top ODM electronics companies in China.
Wiki: technical reference
The wiki is a lookup tool. If you need to know what UN38.3 testing covers for a lithium battery, what the difference is between ESP32-S3 and ESP32-C3 modules, or how to read an IPC-A-610 report, start there.
Each entry links back to the guides and services it relates to, so you can move from a definition to a decision quickly. For example, the UN38.3 battery certification entry explains the test sequence and then points to the certification guide and the private-label service if you are building a battery-powered device.
Case studies: proof with numbers
The case studies are not victory laps. They include the problems: the supplier that looked good on paper but failed the audit, the first sample that passed RF but the second batch did not, the certification that took three weeks longer than quoted because the lab queue was full.
Read the EU industrial IoT gateway case for a 22% cost savings example, the US smartwatch case for FCC and CE timing, or the Amazon private-label IoT sensor case for a 2,000-unit launch timeline.
Comparisons and trade shows
The comparisons section helps you choose a route. Should you use a sourcing agent, buy direct on Alibaba, or work through a Hong Kong trading company? The answer depends on your order size, technical complexity, and how much time you have to manage the factory yourself.
The trade shows calendar lists fairs by month, with notes on which ones are worth visiting for electronics buyers. Canton Fair, Global Sources, electronica China, and CES Asia are all covered, along with advice on pre-registration, hotel timing, and how to avoid the booths that are just resellers. For the latest dates and registration, also check the official Canton Fair and Global Sources websites.
Tools and calculators
The tools section hosts free calculators. Start with the import tariff and landed-cost calculator to estimate duty, VAT, and total landed cost before you commit to an order. More tools are planned, including an MOQ-versus-unit-cost breakeven calculator and a certification-cost estimator.
What to do next
Pick one resource and act on it today. If you are preparing a factory visit, print the factory audit checklist and bring a notebook for serial numbers and test-stand photos. If you are comparing two quotes, run both through the landed-cost calculator and note how the numbers change by shipping mode. If you are planning a trip, check the trade shows calendar and book hotels at least six weeks before Canton Fair phases, when prices in Guangzhou can double.
Who writes this
All resources are written or reviewed by Martin Wang and the sourcing engineers at China Sourcing Agents. We are based in Shenzhen and work from factories, not from a marketing office. We have collectively audited more than 600 factories across Guangdong, Zhejiang, and Jiangsu since 2018. If something on this site is wrong or out of date, tell us and we will fix it.
Have a sourcing project in mind?
Tell us what you need. We respond within 24 hours, including weekends.