Lhasa ancient times known as "Jalan Sa", according to legend the seventh century AD, the Tang Princess Wen Cheng who married into the Tubo, here is a grassland sandy beach, the latter for the construction of the Jokhang Temple and Ramoche soil back fill with the goat lying Tong, temple built after the missionary monk and the more people are coming to pilgrims around the Jokhang Temple built around it has a lot of hotels and residential houses, the Jokhang Temple as the center has formed a prototype of the old city. At the same time the expansion Songtsan Gambo again in Hongshan palace (now the Potala Palace), so, Lhasa river valley plain palaces built one after another, prominent Chinese and foreign cities from the formation of the plateau. "Jalan Sa" has gradually become a people's minds, "Holy Land", becoming one of Tibet's religious, political, economic and cultural center. Tibetans believe that the strict sense of the word "Lhasa" should refer to the Jokhang Temple and around the Jokhang Temple, the street was built up, only to the Jokhang Temple and the street was, to be considered a real Lhasa. Today, the area east of Lhasa still maintained the essence of the ancient city of Lhasa.