Xuan Son National Park located in the territory of Tan Son district, Phu Tho Province has a relatively abundant and diversified forest ecosystem of the North of Viet Nam in particular and Vietnam in general. With the tropical and subtropical forests here, there are quite a lot of rare plant and animal species existing and typical for the northern mountainous region. They are not only valuable for scientific research, preservation of genetic sources, but also have implications for economic development, exploitation of natural resources (especially biological resources) and education of environmental protection.