The turbidity of men's eyebrows refers to men, which means that men are "turbid" compared to women, while women are fresh. This is a sentence from Cao Xueqin in "A Dream of Red Mansions", spoken by Jia Baoyu: "Daughters are flesh and blood made of water, and men are flesh and blood made of mud. When I see a daughter, I feel refreshed, but when I see a man, I feel turbid." ”