The sinicization of Tibet is a term used by some critics of Chinese rule in Tibet to refer to the cultural assimilation that have occurred in Tibetan areas of China (including Tibet Autonomous Region and surrounding Tibetan-designated autonomous areas) which have made these areas more closely resemble mainstream Chinese society. They say that these changes have been most evident since the incorporation of Tibet into the People's Republic of China in 1950/51 and have been facilitated by a broad range of active economic, social, cultural and political reforms introduced to Tibetan areas by the Chinese Government over the last six decades. Critics also point to the government-sponsored migration of large numbers of Han Chinese into the Tibet Autonomous Region as a major component of sinicizat