We use two steps: 1. Insert a medical-grade endoscope through the spark plug hole to visually inspect cylinder wall scratches and carbon buildup on the piston top; 2. Extract an engine oil sample to check for large metal debris or emulsification (caused by coolant leakage).

The nameplate date is the absolute time when the vehicle leaves the factory; the registration date is when the vehicle is registered with the traffic management department after sale. The difference represents the time the vehicle spent in the dealer's warehouse or logistics. If the time difference exceeds 6-8 months, the vehicle is considered a "stock vehicle," and we pay special attention to the natural aging of its rubber components.

Our standard holding period is 3 business days after the deposit is paid (based on the timestamp of the payment slip). The domestic used car market in China moves very quickly, and if we do not receive the bank message confirming the deposit within the specified time, the system will automatically release the hold, and the vehicle will be re-listed for public sale.