The card number is wrong and the status is abnormal.
1. The card number is wrong. If the Agricultural Bank of China Visa supplementary card number is entered incorrectly, or the length is incorrect, the card number will be displayed as illegal. Just try to re-enter it.
2. Abnormal status. The Agricultural Bank of China Visa supplementary card number has abnormal status such as expired, frozen, invalid, etc., and a message will be displayed that the card number is illegal.