from a stereotypical Asian kid -- straight A and playing some instrument well. Princeton (as well as Yale, Harvard...) admits a certain number of freshmen from China every year out of thousands of good candidates. You really have to be outstanding since mere excellence may not be enough. On the other hand, a little handicap in English may not be a big issue if you can convince them you are UNIQUE otherwise. By the way, the interview counts for ~10% in the whole decision making. Good luck!