My hometown is Fuzhou, and it costs only 300 to 400 a month. Now I am studying in Beijing, and the school gym is only one month 100. It's expensive outside, and there are many good ones and bad ones, and the next one is 5.6 million. I've heard of thousands of expensive ones. I don't know where you are, but it should be directly proportional to the local economic situation. You can make a rough guess.