4S dealership records are directly connected to the manufacturer's database, making the data hard to tamper with and the most reliable, with original parts guaranteed; third-party repair shops usually are not connected, making their data unverifiable. Therefore, we only consider the connected records from 4S dealerships as valid historical documentation.

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.

Our system provides basic risk alerts based on the general regulations of the main exporting countries, but the final responsibility for confirming whether the vehicle meets the import country's regulations lies with the buyer. We will rigorously indicate the vehicle's production year, first registration date, and Chinese emission standards (such as National V, National VI) on the details page. We recommend that you submit this accurate data to the local vehicle management department or customs agent for verification before placing an order.