If it's 5000, the available amount is more than 5200, which means you have more than 200 in your card.
Whether the bill is positive or negative, if a negative number is displayed, it means that the bill has a balance when it is settled on the bill date, that is, it does not owe money, but has more money.
Finally, if it is still unclear, just look at the details of the bill before making confirmation.
As for the inquiry of bill details, you can use CCB official website, select "Account Inquiry" on the left side of the homepage, select "Credit Card Inquiry", and then select "Bill Inquiry" after entering the information.