Across the dangerous hills and rivers of Hengduan Mountain Range, in the wild lands and forests across "the Rooftop of the World", a mysterious ancient road winds and wonders. It is one of the most heart quaking roads on this planet. For thousands of years, numerous caravans had been quietly traveling along it.The ancient Tea Horse Road was a trade route mainly through Yunnan, Sichuan and Tibet. In ancient times, people in Sichuan and Yunnan provinces exchanged tea for horses or medicines with people in Tibet. The tea, the medicine and the other materials were transported by Mabang (caravans), and thus the pathway was called the Tea Horse Road.