These areas used to be part of Tibet until Chinese rule. The TAR refers to China's current Tibetan borders and doesn't include these neighboring areas, though Tibetans still consider these areas ...

The already-fraught relationship between China and India is becoming even more tense over Beijing’s plans to build a “super hydropower dam” in Tibet ... data from the Mekong Dam Monitor ...

China continues to consider Arunachal Pradesh a part of Tibet, which it occupied in 1951. The map of China, until now, is based on the 1989 edition of the Sky Map of its national borders.