The deposit is 2000-4000 yuan, which is paid when renting, and only 1000-3000 yuan will be refunded when returning the car, and another 1000 yuan will be refunded after one month, which is mainly used to deal with violations (for fear that the lessee will violate the rules during renting the car).
When renting a car, you need to show your ID card and driver's license, and hand in a copy. Some models or some car dealers need proof of real estate license, but the deposit is only a violation fee.