1. Check account balance: Make sure that there is enough balance on your bank card or credit card to execute the transaction. If the balance is insufficient, the bank may refuse to trade.

2. Check the transaction limit: Some banks have restrictions on the amount of a single or daily transaction. If your transaction amount exceeds the limit, the bank may refuse the transaction. The specific transaction limit can be understood by contacting the bank customer service.

3. Status of check card: Make sure that your bank card or credit card has not expired, been frozen or lost. In these cases, the bank may refuse to trade.

4. Check the transaction type: Some transactions may be regarded as suspicious or risky by the bank, so they may be rejected. For example, frequent large transactions in a short period of time may attract the attention of banks.

5. Contact the customer service of the bank: If the above reasons are excluded, I suggest you contact the customer service of ICBC to find out the specific reasons and seek solutions. It may be caused by system failure or other technical problems, and customer service will help you solve it.

6. Update security settings: Ensure the security of your equipment and network connection to prevent hacker attacks or fraud. This can help you avoid being rejected for security reasons.