Nick mentioning the Chinese aren't good pilots because they can't see due to the slanted eyes... lets say there is more to it than that.
The short version is that Chinese, and Asians in general, can't perceive motion that well, and if you are reading this and don't understand what I mean, a good analogy is the old gaming discussion of 30fps vs 60fps, lets say that Chinese can't even tell between 15fps and 30fps and there is tons of data proving that (I haven't checked each Asian group but there is a LOT of data proving Chinese and South Koreans have issues with motion perception)
DO NOT PLAY RANDOMLY!!! PAY FULL FOCUS TO THE VIDEO.