Can you pair him up with a language "buddy"- a friend who will help him with lunch, getting the correct book out, etc? Be sure and point and label- when you take a book out, point and say "book"......help him learn the names for common objects in the classroom. Help him with "critical" statements- I need to use the restroom; I need help; I am hungry; etc......point to words on the screen as you use the overhead/whiteboard. Lots of repetition and he will quickly make connections. In a way "immersion" works best (although it is kinda trial by fire!).
If he feels safe, learns the routine, and has a buddy he will learn quickly. The routine is critical because that way he can begin to expect "what comes next" and won't feel bad if he does the wrong thing/gets ready for the wrong subject. He mustn't feel too embarrassed, must feel at ease (which will be hard for all of you!), and must be willing to take risks. If he feels comfortable he will learn faster and quickly adapt.
I am guessing he has been in school someplace else, and is probably ahead in areas like math- let him shine where he can, and in nonverbal ways. Also- let him teach you and the class some words in Chinese- it can be a cultural exchange and will help make him proud of this ethnic heritage and his language....and you can all learn to speak Chinese.
Good luck.....it will be an adventure! Hopefully you and your class will learn as much from him as he will learn from you.