2. Artificial cultivation of fir. The cultivation base should be located in a place where wild fir can be picked. All weeds and shrubs in the woodland should be cleared away. After artificial digging, the tree shrews are crushed and dried in the sun, and the pits are dug at the row spacing of 2.5m× 2.5m Then the strains are evenly placed in into the pit, backfilled with topsoil after planting, covered with a layer of loose soil, and finally watered.