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.

We use an internationally certified electronic signature platform (such as DocuSign or Adobe Sign). Each signed contract generates a digital certificate with a timestamp and encrypted hash value, which has full legal defense effectiveness in international arbitration courts.

Start by asking the seller for a photo of the full vehicle registration certificate. Check that the registered owner matches the seller's company name. Any change of ownership should appear with a transfer stamp and date. Second, request a lien check. In China, vehicle mortgages are registered with the vehicle management office. A clean certificate shows no mortgage registration; if one exists, the car cannot be legally exported until the loan is settled and the lien released. Third, verify there are no unpaid traffic fines and no gaps in compulsory insurance, since these can block export clearance. Ask the platform to include a title verification step in the transaction flow, and only pay the balance after the title transfer to the export company is confirmed.