Yoga, ballet and national standard are all acceptable, and aerobics in Duoyan Zheng is not bad. Personally, I don't think it's cost-effective to go to the gym. Let's see if you can stick to it. After all, many people can't stick to it once they go to the gym. If you want to change your body shape locally, you can also go to a beauty salon to do micro-carving.
I hope I can help you ~