Xichang, formerly known as Jiandu, Jianchang and Ningyuan(fu), is a city in and the seat of the Liangshan Yi Autonomous Prefecture, in the south of Sichuan, China. In 2012 it had a population of 481,796. History The Qiongdu were the local people at the time of contact with China. The county of Qiongdu is attested in the area from the Han dynasty. Under the Song dynasty, a local lord was given the title of "King of the Qiongdu" (Qiongdu Wang). The area formed part of the medieval Kingdom of Dali and was subdued by the Mongolians from 1272–4, after which it was incorporated into Yunnan of the Yuan dynasty. It was organized as the Jiandu Ningyuan duhufu, qianhufu, or wanhufu but continued to be often known as Jiandu. In the book of his travels, Marco Polo recorded that the people of Jiandu and its hinterland used no coins but rods of gold bullion reckoned in . Small change was made using half-catty pieces of molded salt, each reckoned as one-eightieth of a of pure gold. Under the Qing, it was officially known as Ningyuan Commandery but also continued to be referenced under the old name Jianchang. In the 19th century, it was the center of Sichuan's production of "white wax". Roman Catholicism (see also Catholic Church in Sichuan) was introduced to Ningyuan in the 18th century by Paris Foreign Missions Society. The Apostolic Vicariate of Kienchang was established in 1910, which was elevated to a diocese in 1946. The episcopal residence is located next to the Cathedral of the Angels, Xichang. Xichang was devastated by a magnitude 7.5 earthquake in 1850, which killed more than 20,000 people. Geography Xichang lies in a mountainous region of far southern Sichuan. The city is just northeast of the prefecture-level city of Panzhihua. The Anning River is the main river in the area. It is an affluent of the Yalong, Jinsha, and Yangtze rivers. It lies near Qiong Lake. Climate Owing to its low latitude and high elevation, Xichang has a monsoon-influenced humid subtropical climate (Köppen Cwa) milder and far sunnier than the Sichuan Basin, with mild, very sunny and dry winters, and very warm, rainy summers. The monthly 24-hour average temperature ranges from in January to in July, and the annual mean is . Over 60% of the annual precipitation occurs from June to August. With monthly percent possible sunshine ranging from 36%