I think this is a tougher question than it sounds, especially based on the previous responses. For one thing, LSAC and law schools don't really care if you are Chinese, when they ask you to tick that box. The category is Asian/Pacific Islander, and that complicates matters. Yes, Asians are one of the biggest minorities in North America. But any given nationality within that would not be, and Asian nationalities are VERY distinct. Japanese, Chinese, Koreans, etc. in Asia would not view themselves as a group that could be lumped together as they are here. That said, perhaps the grouping of Asian/Pacific Islander is fair considering that admissions committees are attempting to look for the treatment of a particular group, and if Asians are perceived as "all the same" (all have black hair, yellow skin, slanty eyes), then Asians may be discriminated against (or gain advantage) all the same, despite different nationalities.
Also, I looked for the stats on LSAT scores, but couldn't find them. But I think last time I saw the stats I was suprised to find that Asian/Pacific Islanders did NOT perform better than the white or undisclosed population. Can anyone find these stats?