Squinting is not only a simple way to vilify, it has a lot of articles behind it.
The image of Fu Manchu, I believe, is no stranger to everyone. Wearing the official uniform of the Qing Dynasty, his face is insidious and cunning, and squinting is its most prominent feature. Fu Manchu is a villain written by British writer SaxRomer, which first appeared in the book the Mystery of Dr. Fu Manchu in 1913. The reason for adopting this image is not only discrimination against Easterners, but also a lot of articles within it.