After logging in to China Mobile's online business hall, why not enter the bank card password, just enter the card number to recharge the phone bill online?

That's because your mobile phone number is bound to the relevant bank card, and there is a small amount of notification-free function, so that the system automatically deducts fees from the bank card bound to this mobile phone number without entering a password, similar to Alipay's small amount of confidentiality-free function.

You can set the payment SMS notification in the bank card security settings or turn off the confidentiality-free function of micropayments, or you can directly modify the online banking password, so that similar situations will not occur.

Unbind the mobile phone number from the bank card or turn off the mobile banking function.