The pig kidney face is also often called the moon face.

Pig kidney face describes a person’s face shape. Originating from Northeastern dialect, it is an adjective for a person's face. Pig kidney face and shoehorn face are basically the same face shape, both are relatively long and concave. However, it is generally believed that the chin of a shoehorn face is larger and protrudes forward, and this chin is used to lift the shoes. A shoehorn has wrinkles on his face, but a pig kidney has no wrinkles on his face.

The popularity of this word comes from a sentence by Heitu in the 1999 sketch "Yesterday Today Tomorrow" by Zhao Benshan, Song Dandan, and Cui Yongyuan, which is that this is the authentic pig kidney face.

Face shape

Face shape refers to the outline of the face. The upper half of the face is an arc-shaped structure formed by the maxilla, zygomatic bones, temporal bones, frontal bones and parietal bones, and the lower half is determined by the shape of the mandible. These are all important factors that affect face shape. The jaw bone plays an important role in determining the basic structure of the face. Face shapes can be classified through different classification methods, and there are differences between face shapes when viewed from the front and when viewed from the side.

There are many ways to classify face shapes. There are various classification methods in ancient Chinese painting theories and physiognomy books, and face shapes are given personality content. Some people also propose that the human face is a three-dimensional image, so it should also be viewed from the side. Observe, this has been ignored before. Indeed, examining the face shape from the side does help to make a comprehensive evaluation of the appearance.