The Naxi or Nakhi are an ethnic group inhabiting the foothills of the Himalayas in the northwestern part of Yunnan Province, as well as the southwestern part of Sichuan Province in China. The Naxi are thought to have come originally from Tibet and, until recently, maintained overland trading links with Lhasa and India. The Naxi form one of the 56 ethnic groups officially recognized by the People's Republic of China. The Naxi are traditionally followers of the Dongba religion. Through both Han Chinese and Tibetan cultural influences, they adopted Tibetan Buddhism and, to a lesser extent, Taoism, in the 10th century. The Old Town of Lijiang dates back more than 800 years and was once an important town on the old Tea Horse Road.