Blue-green shan shui

The blue-green shan shui (), is a Chinese painting style of "shan shui". It tends to refer to an "ancient style" rather than modern ones. The main colours of the paintings are blues and greens, and in the early period it was painted using mineral dyes. This style was first formulated by Li Sixun (), a general, politician and famous painter in Tang Dynasty.
History and sub-styles.
Similar styles appeared before the Tang Dynasty, especially in the period of the Six Dynasties. Many historic records show that Li father and sons – Li Sixun (father) and Li Zhaodao (son, , son of Li Sixun), largely developed the painting techniques and formulated the style.
There are mainly two styles of this painting:
Schools.
Tang Dynasty:
Late Northern Song Dynasty:
Yuan Dynasty, Ming Dynasty and Qing Dynasty:
Quotations.
ZHANG Geng () in Qing Dynasty, said:
TANG Hou () in Yuan Dynasty, said: 