Start with the business license: every legitimate Chinese company has a Unified Social Credit Code. Ask for a copy and verify it on the National Enterprise Credit Information system or via your freight forwarder. Check that the business scope includes 'used car export'—this requires specific qualifications. Next, look for proof of substance: a real office or yard (verify via live video call, not pre-recorded), staff answering on Chinese business platforms like WeChat with consistent branding, and a corporate bank account in the company's name—never pay a personal account. Cross-check trade history: ask for recent shipping documents (blurred bills of lading with customer info hidden), references from buyers in your region, and whether they hold export licenses issued by Chinese commerce authorities. Red flags: prices far below market, pressure to pay quickly, refusal of video calls, or bank accounts in third countries 'for convenience'. Take your time—real exporters pass these checks easily.

Most exporters offer a limited warranty of 30 to 90 days covering major mechanical failures (engine, gearbox, electric motor), but only if you can prove the fault existed before shipment. Cosmetic issues, wear-and-tear parts (brakes, tires, clutch) and damage caused by improper local maintenance are almost always excluded. What is realistic to claim: · Engine or transmission failure confirmed by a licensed workshop within the warranty window, with a diagnostic report. · Undeclared accident or flood damage discovered after arrival (strongest case, keep the inspection report and photos). How to protect yourself: 1. Get the warranty terms written into the contract, including claim procedure and response time. 2. Have the car inspected locally immediately upon arrival and keep all records. 3. Communicate claims in writing (email) with photos and reports attached. Treat the warranty as a backup, not the main protection. A thorough pre-shipment third-party inspection matters far more than a paper warranty.

Once the car system (especially in a closed ecosystem) undergoes a major version upgrade, its bootloader is usually locked, preventing downgrades. If this happens, there is basically no solution in an overseas environment. Therefore, we strongly warn: do not blindly insert a USB drive to upgrade while offline.