Since the peaceful liberation of Tibet in 1951, China has attached unprecedented importance to the preservation of Tibetan cultural heritage. The Central Government has made a series of favorable policies toward the protection and promotion of traditional Tibetan culture in various forms, which have reaped fruitful results.
Since 1950s, a set of archeological relics that may belong to the Stone Age have been discovered in Nagqu, Nyingchi's Medog and Shigatse's Tingri, etc.
In 1961, eight cave tombs were found at the east slope of Pengbo Farm near Lhasa, which opened a new page in scientific archeological excavation in Tibet
From 1977 to 1979, the Karub ruins in Chamdo were excavated, which traced the recorded Tibetan prehistory back to 5,000-4,000 years earlier, causing strong reactions among archeological and Tibetological circles at home and abroad.
Later, archeologists also found the Qoigung Ruins in Lhasa, Trengo Ruins of Lhoka, Hilllock Tombs of Ngari Plateau, Gyarab Hall of Toding Monastery, Piyang Donggar Buddhism Grotto as well as Buddhist Monastery Ruins and North Sagya Monastery Ruins, etc.