Introduction to Xiahe: Xiahe County is the county of Gannan Prefecture in Gansu Province. Because of the name of the Daxia River in the territory. Xiahe County is located in the northwest of Gannan Prefecture. It is adjacent to the cooperative city and Luqu County in the east and south respectively. It is adjacent to Linxia County and Qinghai Xunhua County and Tongren County in the north, and Qinghai Zeku County in the west. In 2011, Xiahe County achieved a regional GDP of 104.66 million yuan, of which the first industry realized an added value of 322.9 million yuan, the second industry realized an added value of 241.57 million yuan, and the tertiary industry realized an added value of 48.213 million yuan. By 2013, Xiahe County was 6,274 square kilometers, including 3 towns and 10 townships; 87,800 people, of which Tibetans accounted for 81.8%. (Overview picture, the ruins of the octagonal city of Xiahe County)