Why does Alipay generally withdraw the current available balance and the amount that can be withdrawn?

The balance of Alipay in Yu 'ebao may have some money that can't be withdrawn.

Steps for Alipay to transfer money to bank card:

1. After logging in to Alipay, enter my Alipay and click Transfer Out;

2. Click Transfer-out, select "Transfer-out to Bank Card", and then select a bank card (not required if a bank card is bound; If there is no binding, you need to choose a bank card, and the name of the bank card account must be the same as the name of Alipay's real-name authentication);

3. Enter "Transfer-out Amount", and after verification, enter "Alipay Payment Password" and "Confirm Transfer to Bank Card", and the transfer to Bank Card is successful.