Do not use a high-pressure water gun directly! The high-pressure water can instantly damage the fragile aluminum fins of the condenser, leading to a permanent decrease in cooling efficiency. We can only use a low-pressure air gun or a soft brush for surface cleaning.

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).

We repeatedly confirm and emphasize to buyers before sale: after leaving mainland China, most Chinese smart electric vehicle ecosystems (such as cloud voice assistants, online maps, OTA updates) will be permanently offline. You are purchasing a hardware platform with excellent mechanical quality and a three-electric system; please use it as a "standalone" vehicle. Do not trust false promises from other channels claiming "perfect overseas unlocking and continuous official OTA updates."