You'll begin in Beijing and travel to Xian, which is the eastern end of the traditional Silk Road.
Tian Xian is said to be a cocktail of 15 plant extracts, including ginseng and licorice.
Standard 28 day tours include visits to Beijing, Xian, Lhasa, Shigatse, Lhatse, Saga, Paryang, Manasarovar Lake, Tarchen, Mt. Kailash, Tarchen, Tsada, Seng Ge Tsangpo, Gertse, Tsochen, Lhatse, Shigatse, Lhasa, and Shanghai.