The most lively night market in Ya 'an is located at Xikang Wharf, Chaoyang Street and the Tsing Yi River near Xuan Ji Supermarket. Ya 'an, a prefecture-level city in Sichuan Province, is located at the western edge of Sichuan Basin, at the foot of Qionglai Mountain, adjacent to Chengdu in the east, Ganzi in the west, Liangshan in the south and Aba in the north. It is 0/20km away from Chengdu/Kloc, which is known as the Sichuan-Tibet food belt. Night markets appeared in big cities in the late Tang Dynasty. During the Song Dynasty and the Northern Song Dynasty, the rulers explicitly allowed the night market in Tokyo (now Kaifeng City, Henan Province) in the Northern Song Dynasty. Nowadays, it refers to a market that mainly trades at night, which may sell groceries, snacks, games and so on. Night markets are usually important tourist attractions in tropical and subtropical countries. In Chinese mainland, Taiwan Province Province, Hongkong and other places, it is one of the important representatives of civilian life culture.