Which Didi company in Shanghai is regular?

Cao Cao special car, the first car about the car, Didi Chuxing, Shenzhou special car. According to the automobile Jianghu. Com, there are several more formal online car rental companies in Shanghai: Cao Cao car, Shouqi car, Didi Chuxing and Shenzhou car. These online car rental companies all have business licenses, and they are all listed through qualified procedures.