credit card, with consumption, the bill is displayed as a positive number, and the displayed positive number is the amount of consumption. If there is extra money in the card, the bill will be negative.

so your bill is OK, there is no problem, don't worry.

it is safe to deposit money in a credit card, but there is no interest when money is deposited in a credit card, and there is current interest when it is deposited in a normal debit card. The interest rate of current interest is .35%. You can use it as a deposit card if you want, but there is no interest.

The Bank of China credit card has now been exempted from the handling fee for overpayment and withdrawal, which means that you don't need to provide additional fees for taking out the extra money. Credit card overdraft consumption, if there is an overflow deposit in the card (that is, the overpayment, the money you deposit more), this part of the money will be used first when spending by credit card. Only when all this part of the money is consumed, will you continue to spend by credit card.

if you don't understand, please ask. If you are satisfied, please adopt it.