Tourists walk on an ancient path in Wuli Village, Bingzhongluo Township of Lisu Autonomous Prefecture of southwest China's Yunnan Province, Feb. 21, 2011. The path was excavated and paved on cliffs as a section of the Cha Ma Route, which literately means Tea Horse Road. Beginning in the Tang Dynasty (618-907), this business route was traveled by caravans across west and southwest China's Yunnan, Sichuan, Gansu and Qinghai provinces and Tibet Autonomous Region to reach south Asia. (Xinhua/Qin Qing)