1. First check the points balance to ensure that the Bank of China points balance is sufficient to exchange for WeChat instant discounts. To confirm whether there are any abnormalities in the points balance, you can check your bank account, points account or contact Bank of China customer service.

2. Secondly, check the exchange record. If you have redeemed the WeChat instant discount, you can check the exchange record and transaction details. See if there are any exceptions or errors logged to determine if an error or problem occurred.

3. Finally, contact customer service. If you have any questions or concerns, it is best to contact the customer service department of Bank of China. It can provide individual account-specific help and solutions to resolve issues.