What is the painter Gu Kaizhi's landscape painting theory?

Gu Kaizhi's landscape painting theory has a great influence on later generations. The mountain he painted has a light-receiving surface and a back surface, and the water has a reflection. Xiangyun can be an important scenery in the east and west, and the sky is "empty" to set off the weather with the sun.

In addition, there are far and near peaks arranged in the east-west direction, resulting in a high and dangerous situation, as well as the "confrontation" of the middle section layout, which is of relative significance. The east, west and middle mountains should be closely connected, and more than one third of the mountains should be divided into two parts.

Gu Kaizhi's landscape theory is very important, because he put forward the line shape of clouds, the overlapping form of bird's-eye echo, and the spatial pattern of three mountains and three points.