This situation probably occurs because you have operated a local store.

Most Chinese sellers open cross-border stores and cannot directly bind a bank card; binding a bank card is an operation for Shopee local numbers. You can only bind it by filling in a local mobile phone number and bank card. If you fill in a Chinese mobile phone number, it will only prompt that it is invalid.

Shopee cross-border stores need to be bound to one of the three third-party payment methods: PingPong, Lianlian, and Payoneer. You can find the corresponding binding entrance below the bank card. Then you can use your Chinese mobile phone number to register these payment methods, and then bind the Shopee store.