Introduction to the pine forest: Pangquangou is the native place of North China larch, and it is also a coniferous and broad-leaved mixed forest belt dominated by North China larch and Pinus tabulaeformis. The forest based species can be roughly divided into five types: North China larch natural secondary forest pure forests are distributed in the core area, Bashuigou, Shenwei Temple and other areas, accompanied by spruce, white birch, aspen, pine, oak, Red birch and other tree species; spruce forests are mostly distributed in Bashuigou, Xitagou, Dayei and other places; Pinus tabulaeformis forests are mainly distributed in Yanggetai experimental area; poplar-betula broad-leaved forests are located on sunny slopes, near ridge lines and in semi-mountainous areas. The main component of forest vegetation on yin and half-yang slopes; Quercus liaotungensis forest is mainly distributed on sunny slopes.