大研古城丽江古城包括白沙古城-束河古镇-大研古城。大研古城坐落于丽江坝子中部,海拔2416米,始建于南宋末年,是元代丽江路宣抚司,明、清丽江府驻地。丽江古城的发展,经历了漫长的历史。元代蒙古军队征服云南以前,纳西族四大支系各自为主,社会经济尚处于从游牧向农耕的转型期, Ancient City of Dayan City, including the ancient city of Baisha Ancient City - Shuhe Ancient Town - Dayan ancient city. The ancient city of Dayan is located in the middle of Lijiang Bazi, 2416 meters above sea level, was built in the late Southern Song Dynasty, Yuan Dynasty Lijiang Xuan Fusi, Ming, Qing Li Jiang resident. The development of the ancient city of Lijiang, has experienced a long history. Before the Mongol armies conquered Yunnan in the Yuan Dynasty, the four major branches of the Naxi people were mainly based on each other. The social economy was still in a transitional period from nomadic to farming.