Why should I enter SMS verification code when logging in to ICBC's personal mobile banking client?

In order to improve the security of mobile banking, China Industrial and Commercial Bank provides you with the binding function of mobile banking. When you log in to the mobile banking client, ICBC will send a short message verification code to the mobile phone number registered by your mobile banking, and bind it after the authentication is successful. The next time you log in to this client, no authentication is required. Tips: If you change the client login, you need to re-authenticate and bind the SMS.