Very troublesome. As far as I know, you can't leave the class, you can only transfer. You have to pay a handling fee, which is 15% of your total price, and then fill out a form and apply to the coach. There is no receipt and invoice for this transfer fee, and buying a class card will not be made clear. In short, you will find that you have been cheated. You have to explain, you go to the store manager, and the coach will play Tai Chi with you. In short, if your class can be transferred and the class participants will give you a transfer fee, then there is no problem.