For thousands of years, there was an ancient road treaded by human feet and horse hoofs in the mountains of Southwest China, bridging the Chinese hinterland and the Qinghai-Tibet Plateau. Along the unpaved and often rugged road, tea, salt and sugar flowed into Tibet, while horses, cows, furs, musk and other local products came out. The ancient commercial passage, dubbed the "Ancient Tea-Horse Road", first appeared during the Tang Dynasty (618-907), and lasted until the 1960s when Tibetan highways were constructed. Meanwhile, the road also promoted exchanges in culture, religion and ethnic migration, resembling the refulgence of the Silk Road.
The road stretched across more than 4,000 kilometers mainly in Southwest China's Sichuan and Yunnan provinces and the Tibetan Autonomous Region. Just as the Silk Road, the Ancient Tea-Horse Road disappeared with the dawn of modern civilization, but both routes have played very important roles in the development of China. Different Chinese ethnic cultures, such as the Dai, Yi, Han, Bai, Naxi and Tibetans, have met, fused and developed along the historic road.
The road ran across the Hengduan Mountains and the Qinghai-Tibet Plateau -- an area of the most complicated geological conditions and most diversified organisms. Besides its cultural and historic value, the road was also highly appreciated by adventurers and scientists.