Introduction to the Tang-Tibet Ancient Road: The Tang-Tibet Ancient Road was a very famous transportation avenue in ancient Chinese history. It was also the only way from the Central Plains to Qinghai, Tibet, and even Nepal, India and other countries since the Tang Dynasty. It starts from Xi'an (i.e. Chang'an) in Shaanxi Province, passes through Gansu and Qinghai, and ends at Lhasa (i.e. Luoxe) in Tibet, with a total length of more than 3,000 kilometers. The entire ancient road traverses western China, crosses the world-famous Roof of the World, and connects my country's friendly neighbors in the southwest, so it is also known as the South Silk Road.