Self-service repayment means that you must have an ICBC debit card with the same name as this credit card, and then go to the bank to make relevant repayment. The bank will automatically deduct your credit card account from your debit card on the repayment date every month.

There is no such thing as a deadline. You mean the due date, which is the deadline for your repayment.

Redeeming points is an activity of the bank, that is, you will get certain points when you spend or withdraw cash with a credit card, and you can use these points to exchange corresponding gifts, which can be found on the bank's website. Of course, different credit cards have different points for various purposes.

The only way to increase the credit limit is to call the customer service of the bank after you have used the credit card for a certain period of time and ask for an increase in the credit limit. Of course, the bank will give you approval, provided that you use a high credit line during your use.