Some people are born with large skeletons, which are related to genes and races. For example, orientals look thinner than westerners, but their faces are bigger, while westerners are just the opposite. Zhong Yicheng believes that this is also related to the sleeping habits of childhood, because westerners are generally used to sleeping, and their faces will be sharper and thinner; Most orientals sleep on their backs, with flat heads and wide faces.

This is a passage on the website, but personally, the most important thing is race and genes, which exaggerates the role of sleep. Hmm. How interesting ...