What do you mean, you know nothing but skin and bones?

Only know the fur but not the bones: only see the fur but not the bones.

Metaphor only sees the surface of things, but does not see through the essence of things.

Most people in the world have shallow eyes, only skin deep and no bones. From Wake Up the World edited by Feng Menglong. Sanyan is an important part of China's collection of ancient vernacular short stories, which is as famous as Yu's Famous Tales and Shi Jing. Usually, it is also called "three words and two beats" with the surprise of the first moment and the surprise of the second moment at the beginning of Ling Meng.