You should lose weight first, and want to be a muscle like Zac Efron! There is a playground in the school, isn't there? You should make sure that you run 5000 meters a day and stretch well after running, so that the stovepipe thin belly is fine. Can reduce the height to 160, which is beneficial to muscle training.

If it is difficult or almost impossible to practice without fitness equipment, it is recommended to go to the gym! You can do sit-ups (daily 10 group, 1 group, 30) and push-ups (about 8 groups, 1 group, 12) in the dormitory. Is it possible to do pull-ups? (a group of 12, until tired)

If you know nothing, keep asking me!