I am an employee of Bank of China. Let me explain this question to you.
The available limit is 500, which means your credit limit is 500. It is the total amount, not the single amount. Cash advance refers to withdrawing cash from the bank, usually 30% of the total limit. If your limit is 500, the cash advance limit is 150.
The installment limit refers to when your limit is reached. , you can use the installment amount, that is, 500. It means that when you consume 500, you can repay (pay) in installments, instead of paying 500 in installments each time. For example, if you buy something for 3,000, you can pay it back in 6 installments. If you buy something for 500, you can pay it back in several installments.