Gansu used car market. Lanzhou has Chengxin used car market, Gansu used car market, and the heart has used car market. The largest second-hand car market in Gansu, bordering the Yellow River in the north and National Highway 3 12 in the south, covers an area of more than 26,000 square meters and can accommodate more than 400 second-hand cars at the same time, making it the largest in Lanzhou.