When will the credit line be restored after successful deduction by mail or circular?
Generally, the line will be restored the next day after repayment. If the limit is not restored after repayment, I suggest you log in to the "China Post Wallet" APP again later.
If the loan products you apply for are "revolving loans" and "mail you flowers" of China Post's consumer finance, the principal you return will be restored to the limit and can be recycled.