1. The balance of WeChat change account is insufficient.

2. Payment failed due to WeChat system failure, need to upgrade or insufficient memory.

3. Running out of WeChat's own payment limit will lead to payment failure.

4. WeChat payment function is limited. If it is blocked due to violation, it needs to be unblocked before operation.

5. WeChat has no bank card. If WeChat runs out of its own payment quota, but WeChat has no real-name authentication or no bank card, it will also cause payment failure.

1. In terms of payment methods, WeChat payment is generally divided into two payment methods. One is code scanning payment, which means that we scan the merchant's payment code through WeChat, which is actually a transfer operation, but credit cards generally do not support transfer operations, so this payment method cannot be paid by credit cards;

We pay with our own payment code. In this case, we need merchants to support customers to pay by credit card before normal use, and we need the remaining credit cards to meet the payment amount this time, so as to successfully complete credit card payment.

It may be caused by our own carelessness. Generally, when we pay, we need to choose payment methods, such as change, bank card and credit card. If we forget to pay by credit card, we can't pay by credit card.