I used to do that ~ I worked in a bar, too. . At first, the bank will only give you a small overdraft limit, usually around 3000 yuan. . Every bank is different. I handle China Merchants Bank! I adjusted the overdraft limit to 5000 yuan (it was urgent money at that time), and then I paid it back to 300 yuan every month. . After the credit value increases, the bank will increase your overdraft limit. .