by our own experience:

try to make good friends. Our son is not a muscle boy, due to bad genes from me and his mom. He had many friends, including those strong muslce black boys.

Based on some posts here, i guess this also depends on schools. In my son's school, there is "0" tolence policy. In this school, 拳头 big can be an immediate problem. If one person, like the "star" mentioned in a yesterday's post, his behavor will ensure him to be expelled from the school immediately. It happened once in my son's school; the child bullied the other one (big fight, like the one mentioned yesterday) was forced to leave the school the next day. I guess that is y very few bullying has been heard in his school. I can only say for the school I know; i guess it might be different in different schools.