The  Eco-recycling Modern Agricultural Park, located at the Xingzhou village,  Luanping county, Chengde, Hebei province, covers an area of 1,900 mu. In the  park, the cow manure produced by the dairy farm is separated into solid and  liquid. The liquid is fermented to produce biogas for winter heating in the  park.The solid excrement and the chicken manure produced by the chicken farm  are properly mixed with wheat straw to be used as base for bispore mushroom  after being fermented three times. When mushroom is picked, the left fungous  material will be used to breed earthworms and then earthworms will be  processed into feeding for egg chicken and fish. The wormcast will be  processed into organic fertilizer for organic vegetables and fruit trees  planting. The whole process forms a closed circulation of ecological  agriculture industry chain. On the basis of this chain, projects such as  sightseeing tourism, fruits and vegetables picking are constructed. It  finally realizes the collection of planting, feeding, sightseeing and  entertaining, being a demonstration garden of ecological organic, green  environmental protection.