Introduction to the protected area: Raohe Northeast Black Bee National Nature Reserve was established in 1997. Starting from the boundary of Raohe administrative district, it extends 20 kilometers outward to cities and counties in the west, south and north directions. Among them, the core area covers an area of 4,965 square kilometers, the buffer area covers an area of 6,400 square kilometers, and the experimental area covers an area of 400 square kilometers. The ecological environment in the area is good, with a forest coverage rate of 51% and a green coverage rate of more than 80%.