When making payment through industrial and commercial online banking, you need to enter the short code of your mobile phone every time.

This is a normal phenomenon, because you and your friends chose different reminding methods when opening online banking. Specifically, you didn't choose mobile phone verification when you started online banking, so now you don't need to enter the mobile phone verification code for every online transaction, and your classmates choose to enter the mobile phone verification code for confirmation every time. In fact, whether you need mobile phone verification depends on whether you personally feel it is necessary. Some people think it is safer to add a mobile phone to verify, while others think it is necessary to check the mobile phone every time. In short, it is up to you. If you really want mobile phone authentication to ensure transaction security, you can go to the bank to re-apply for online banking.