Introduction to the Ancient Tea Horse Road: Western Sichuan includes Ya'an and the Garze Tibetan Autonomous Prefecture in the west. It is a corridor for ethnic migration and an important thoroughfare for exchanges and trade between Han, Tibetan, Yi and other ethnic groups since ancient times. It is also what the world is looking for. Shangri-La core area. Since the Han Dynasty, tea and horses have been important trading commodities in the Sino-Tibetan area. The route is: Chengdu → Linqiong (today’s Qionglai) → Ya’an → Yandao (today’s Yingjing) → over Daxianling to Yanniu County ( Today's Hanyuan County) crossed the Dadu River to Moxi and Muya Grasslands (today's Tagong and Xinduqiao areas), and then went to Tibet, Qinghai or Nepal from the Sichuan-Tibet South Road or North Road. This is the world-famous tea Ma Hu City, the road it passes is named the Ancient Tea Horse Road by historians and scholars.