Because Chinese are pretty in line with Republican policies:
-Chinese are racist. We don’t like dark skinned people
-Chinese don’t like affirmative action, since it works against us
-Chinese don’t like illegal immigration. Almost all of us are legal immigrants.
-Chinese believe marriage should only be between man and woman. No LGBT support.
-Chinese don’t like drugs
-Chinese don’t like abortions
-Chinese are fiscal conservatives
-Chinese are selfish and don’t like to share their money with others
-Chinese hate political correctness
-Chinese love strong leaders like Trump and Putin (like Xi)
-Chinese believe in traditional gender roles and family values
So, Chinese vote Republican