1: You entered the wrong online account and password by mistake, and re-entered the correct account. I usually leave it for you when I install broadband. If you lose it, you can go to Telecom/Netcom/Tietong with your business license. )

2: Your broadband has expired, so go to the business hall to renew it.

3. Abnormal shutdown when surfing the Internet, resulting in online account on the server. The account password that caused you to prompt wrong online.

4. The account binding information in the computer room of the operation center is wrong, so you need to contact the after-sales maintenance personnel to solve it.

5: Someone stole your account to surf the Internet. (This kind of situation is rare)

6. Call customer service 10000 to save trouble.