How to enter the verification code for Unicom's online inquiry of the phone bill balance?

When a mobile phone logs into Unicom's mobile phone business hall, it is necessary to enter the business password and verification code, and check whether the entered password and verification code are correct. Input method needs to choose the letter and number input method that comes with the mobile phone. After entering, confirm whether the browser sends the currently entered service password and verification code. Please adopt satisfactory answers if helpful.