Why is there money in the bank card, but the short message prompts that the payment failed?

Just remind me to hand in 100. Because it's just a SMS reminder of the online banking card. (Not including all payments for all purchases)

You want to ask: why not remind you to pay 600?

Solution: Because you were reminded when recharging 500 yuan for Alipay, it means that you have already paid 500 yuan from your card, but 500 yuan only paid it to your Alipay, so this time you only paid 100 yuan in the SMS reminder from 600 yuan.

For example, if you put 1000 yuan with me, and this time you get to 500 yuan, I will remind you to take 500 yuan, and tomorrow you will use 600 yuan to buy things. When you pay, you take 1 0,000 from me, which is enough to pay. I said you got 1000 this time, not 600.