Of course, the merchant has to pay the full amount. If your credit card limit is only 2000, you can only charge 2000, and the rest will be paid in cash. I don't know how long your credit card has been used and what credit history you have. Generally, the Bank of Communications credit card will automatically increase your credit limit if it is used for more than half a year, or you can call the Bank of Communications to ask if it can help you increase your credit limit. If it can't increase the permanent credit limit, you can ask if it can increase the temporary credit limit.

If the landlord really needs to buy apples, I can also teach you a way. You can withdraw 2000 yuan from your credit card, and then go to the pawnshop to ask if they have any apples for you. Generally, they will sell you what they can sell in the store, and there will be no problem with the machine, because they will not accept it if there is a problem. If you are lucky, you will encounter something new close to 100%, and the price will definitely be much cheaper than the market.