Credit cards can save money, but generally speaking, credit cards that can be overdrawn will be charged a withdrawal fee.

My credit card is 10000. How much can I charge at most?

Available line 10000, and the maximum can be 10000.

3. If the credit card can deposit money, my credit line is 10000, so I deposited 10000 in it, which is 20000 if the credit line is included. How much can I brush next time? Is it 1000 or 20000?

Add the credit line of 10000 and your deposit of 10000, and the total available line will become 20000, up to 20000.

3. Can a credit card open online banking?

Credit cards can be opened through online banking.