The limit is only 1000. You can only brush 1000 yuan. "Available line" refers to "balance in the card". The credit limit is the maximum amount that a credit card can use. The withdrawal amount refers to 500 yuan where you withdraw the most cash from ATM or bank. In addition, 500 yuan can buy things by credit card.

But the 1000 credit card is really boring. If you want to go to Xingye, Transportation or China Merchants Bank, you can at least do1w.