The Rice City of Aden was first discovered by Joseph Locke, an American missionary. In 1928, Locke started from Lijiang in Yunnan, reached the Rice City of Aden by way of Muli County in Sichuan, visited around the three holy Snow-covered Mountains, and delivered the photos he had taken to the magazine "National Geography", which caused a huge reactions in America. The novel "the Disappeared Horizon", which introduced Shangri-la into people's memory and imagination, was just created according to the picture taken here. In 1996, experts confirmed that, the Shangri-la where Locke arrived was The Rice City of Aden. The small city in the southwest of Sichuan becomes a holy land for domestic and foreign backpackers and is regarded as "the last Shangri-la".
Aden Natural Reserve lies in Riwa Village in south Daocheng County, Ganzi Prefecture. The scenic spot has an elevation of 2,900 m (the river mouth of Gongga) to 6,032 m (Xiannairi Peak), covers the area of 56,000 hm². The spot is composed mainly of three snow peaks, the Xiannairi Snow Peak, Yangmaiyong Snow Peak and Xialangduoji Snow Peak and stretches from the north to south. Because of the special geographical environment and natural climate, the scenic spot has formed unique landform and natural landscape, which is the best-preserved natural ecosystem in our country.