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).

For B2B large customer orders, a "sampling + full inspection" dual regulation is adopted. Core parameters (no major accidents, no water damage or fire) are subject to 100% inspection per vehicle; appearance and condition are uniformly graded (e.g., uniformly purchasing Grade A), and panoramic images of all vehicles in the batch along with a core indicators comparison list are provided before shipment.

This is considered a force majeure risk. We will require the vehicle's state of charge (SOC) to be maintained in a safe dormant range of 30%-50% before loading, and we will insure you for all marine risks under CIF terms. If the battery suffers thermal runaway total loss due to abnormal cargo hold temperatures, the insurance company will compensate.