A Certificate of Origin (CO) is an official document stating where the vehicle was manufactured. For imports from China, it matters more than many buyers expect. First, customs value: many countries apply duty rates based on the country of manufacture, not where you bought the car. A CO proves the vehicle is Chinese-built, which determines the correct tariff line—skipping it can mean reassessment, fines, or seizure at destination. Second, trade agreements: some countries have preferential tariffs for Chinese goods that only apply with a valid CO. Request a CO issued by the China Council for the Promotion of International Trade (CCPIT) or China Customs, not a self-printed form. Check that the VIN, engine number, and buyer details match your purchase documents exactly. Make receiving the CO a condition before your final payment, and keep the original—customs at destination will ask for it.

A cold start reveals problems that a warm engine hides. Ask your inspection agent to perform and film this sequence. First, the start itself: the engine should crank smoothly and settle into a stable idle within a few seconds. Extended cranking, blue or white smoke, or a lumpy idle suggest worn internals or head-gasket issues. Second, listen for timing-chain rattle or metallic tapping in the first ten seconds — cold top-end noise often means deferred maintenance. Third, watch the exhaust on a cold morning: brief white vapor is normal in winter, but persistent blue smoke means oil burning, and sweet-smelling white smoke can indicate coolant leaking into the cylinders. Fourth, have the inspector scan the OBD system right after the cold start; misfire counters and fuel-trim values are most honest when the engine is cold. Ask for a continuous, timestamped video from outside the car before startup through at least five minutes of idling, so you can verify the engine really was cold.

Our documentation department has the latest versions of UN38.3 (United Nations Transport of Dangerous Goods Test and Standards) and MSDS reports authorized or filed by major Chinese new energy brands (such as BYD, Geely, GAC), which are essential customs documents for declaring dangerous goods to the maritime authority.