If you ask for a refund, you can consult their course consultant first, especially to find the person who bought the course for you at that time. Because I took an adult course there, I asked for a refund at the wrong time. I was reluctant at first. Fortunately, I found their supervisor after I came back and explained the situation. I went through the formalities smoothly, that is, they would keep me waiting for more than ten days, but they would pay you back in the end. Unlike later, when I was in a class in Weibo, Xuzhou, I asked them to give me a refund because I couldn't go on studying. I was told on the spot that I would not refund my money if I signed the agreement, and it has not been solved yet!