Burmese came to China to attend high school.

This doesn't seem to work. You'd better consult with the immigration department. If you want him to go to school in China, you can register the index of super-life at the local police station (to be clear, you claim the child as your own child), and you have to pay more for super-life, otherwise it will be difficult to come to school here, even though the school agrees, the formalities can't be done.