Introduction to the warm mixed wood forest: The warm mixed wood forest is distributed on the mountains on both sides of the Malan River Valley. It has no certain dominant species and is composed of several or more than ten deciduous broad-leaved tree species. The main tree species that make up the trees are maple, ash willow, walnut tree, linden tree, hornbeam, Ailanthus altissima, saponaria, catalpa, ingot maple, oak oak, Quercus mongolica, red pine, etc.