1. Before registering Uber, you need to bind a credit card or Alipay, just to let Uber directly deduct money from Alipay or the credit card. This process is automatic and does not require any operation.

2. You need to charge enough money to Alipay, or don't overdraw your credit card. If Alipay or credit card fails to deduct the fee, you must pay it before the next car reservation.