You've misread/misunderstood the book review. It's saying the exact opposite, and the same thing as you; that in the book, the aliens are more like westerners, and the humans Chinese.

The thesis as given - "The real aliens are the Chinese people" (note the 'real') - is saying that, to an American reading the book, the portrayal of the humans feels more alien than the extraterrestrial aliens, while the extraterrestrial aliens are closer to familiar western culture.