Fenglin National Nature Reserve lies at the southern section of Lesser Hinggan Mountains in Yichuan City, Northeast China's Heilongjiang Province. The Reserve was established under the approval of the provincial government in 1958, and classified as a national reserve in 1988. In 1997, Fenglin National Nature Reserve joined the International Man and Biosphere Reserve Network of UNESCO. With an area of 18,400 hectares, the Reserve is established mainly to protect its dense virgin Korean pine (Pinus koraiensis) forests, the last virgin forest in the area.

The forest belongs to the vegetation zone with coniferous and broad-leaved mixed forests. It belongs to the Lesser Hinggan Mountains and varies from 280 meters to over 683 meters above the sea level. The terrain slopes gently and there are many hilly lands and wide valleys. The branches of Fenglin and Tangwang flow through the whole Reserve. The zonal vegetation is a temperate mixed forest of coniferous and broad-leaved trees, but the main vegetation type is Korean pine forest. In the Reserve there are 568 species of higher plants, among which the Korean pine is a rare and precious species in the northeast of China. The diameter is 1.4 meters at most and the highest tree reaches 37 meters. Tall and straight Korean pine is good construction materials for it is easily processed without being cracked. China's Korean pine is mainly distributed in Lesser Hinggan Mountains and Changbai Mountains, while Korean pine in Fenglin National Nature Reserve accounts for over 80% of the total both in terms of number and storage.

Besides Korean pine, many other coniferous and broad-leaved trees are distributed here such as Manchurian ash, Larch, Spruce and Fir. Below the trees are grapes, the Chinese magnolia vine and other herbaceous plants.

The Korean pine mixed forest is typical vegetation in the moist Northeast China. The Reserve has not only preserved precious Korean pine resources but also become a natural museum and genebank of species, which provides favorable conditions for scientific research, education  and manufacturing activities.