Battery condition is the single biggest value factor in a used EV, and it can be measured — do not accept a verbal "battery is fine" without data. First, ask for a battery health certificate: brands like BYD, NIO, XPeng and Li Auto can generate an official state-of-health report from the VIN, usually within minutes at a dealer or via the brand's app. Look for SOH above 85% for a car under five years old. Second, request a charge-and-discharge test during inspection: the displayed range at 100% charge compared with the original rated range gives a practical health estimate. Third, check battery warranty status. Most Chinese brands offer 8 years or 150,000–200,000 km on the battery pack, and the remaining warranty usually transfers with the car — get this in writing. Fourth, for cars heading to hot climates, confirm the battery cooling system works; overheating is a common killer of battery life. Add a minimum SOH guarantee to your purchase contract so you have recourse if the battery underperforms.

Strict definition: All metal body parts (doors, hood, fenders) and the frame must retain the original factory paint, with uniform paint thickness readings. Minor touch-ups or replacements of plastic bumpers, as they do not affect metal corrosion protection and vehicle structure, can still be classified as "original paint" in a broad sense, but we will separately note the condition of the bumper.

Heavy-use vehicles often look clean in photos but show specific wear patterns. Here's what to check: 1. Rear sag and suspension: ask for a side-profile photo of the car on level ground. If the rear sits noticeably lower than the front, the rear springs or shocks may be worn from constant heavy loads. Compare with factory ride height specs. 2. Pedal and seat wear: accelerator and brake pedals with polished metal patches, and a driver's seat bolster that is flattened or cracked, indicate high mileage or intensive commercial use — even if the odometer says otherwise. 3. Hitch and tow bar marks: check the rear bumper area in close-up photos for scratches, bolt holes, or a removed tow bar mount. Ask the seller directly whether the car ever towed. 4. Underbody and frame: request underbody photos. Look for bent or scraped crossmembers, fresh undercoating hiding damage, or uneven tire wear across the rear axle. 5. Data check: many ride-hailing cars in China have records in maintenance databases — a professional inspection agency can flag cars with commercial fleet history. If the seller refuses underbody or close-up photos, treat it as a warning sign and consider another vehicle.