In Zhangwu County, Fuxin City, Liaoning Province, all you can see are green lands. Located in the southern part of the Horqin Sandy Land in Northwest Liaoning, Zhangwu County is the choke point of the southward invasion of the sandy land. Several generations have made continuous efforts to plant trees, which stops the southward invasion step of the Horqin Sandy Land. Nowadays, Nagu Mountain boasts a picturesque scenery. Clear Deligeer Lake reflects white clouds, with green pasture on the one side and Three-North Shelterbelt on the other side. White windmills stand among the trees. Former sandy lands have now turned into lush forests, leading local people to prosperity.