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 will use a megohmmeter (insulation resistance tester) to measure the insulation resistance of the high-voltage bus. If the resistance value is below the national safety standard, it indicates a risk of leakage, and the vehicle will be deemed unqualified.

Chinese customs strictly prohibits the export of assembled or cut vehicles that meet mandatory scrapping standards. Since our pre-inspection is very strict, this situation is highly unlikely. However, if the vehicle is detained and returned by customs due to a policy misjudgment, we will fully refund your deposit without interest, ensuring you bear no policy risk.