How much money can Didi car owners in Zhangjiagang earn every day?

This depends on individual working hours. Generally, if you work for 8 hours, the profit will be about 300.

Zhangjiagang belongs to Suzhou City, so the passenger flow should still be quite large

Didi Chuxing is a one-stop mobile travel platform launched by Beijing Xiaoju Technology Co., Ltd. and was launched on September 9, 2012. It covers travel and transportation services such as taxis, private cars, Didi Express, ride-hailing, chauffeur services and buses.