回複：會不會影響我以後入境?

If you just leave and go back to China, I do not think they can find you. What is the ID you gave to them? If they just have your name, then don't worry. You even don't have to pay last month rent, just leave. It will take them a while to finish all the steps to kick you out.. They might be able to win if they sue you in the small claim court, but it is their responsibility to find you and get the money from you. But if you are in China, there is nothing you need to worry.