Introduction to the original secondary forest: The source of the Qianjiang River, with luxuriant forests, ancient trees, brilliant mountain flowers, and extremely rich wild plant resources. Many areas still retain large areas of original secondary forest, with high mountains and dense forests, towering ancient trees, and a forest coverage rate as high as 97.55%. According to preliminary surveys, there are 720 species of woody plants in 98 families, 287 genera, and a large number of ferns, vines, and grasses. This is a natural biological gene bank. At the same time, it has obvious regional characteristics in the vegetation distribution, making it a rare and good place for scientific investigation.