Why do you send text messages every day when you deduct money from subway payment?

This is a form of notification. The essence of subway "face brushing" is "biometrics+credit payment", which combines the latest scientific research results of biometrics, non-inductive payment and other functions. It's convenient to record the deduction information by texting every day. SMS notification refers to the change of funds in the user's bank account, and the bank will send SMS to the user's mobile phone.