2. Mangshan Mausoleum, a national key cultural relics protection unit, is located on Mangshan Mountain, which is nearly 50 kilometers long from east to west and 20 kilometers wide from north to south in Luoyang City and Mengjin County, Henan Province. In the theory of geomantic omen, the burial place pays attention to the cohesion of life, the wind can't blow, and water blocks life. Mangshan area is an ideal place for camping and sweeping graves.