Longju

Longju or Longzu (Tibetan: གླང་བཅུ, Wylie: glang-bcu; Chinese: 朗久; pinyin: Lǎngjiǔ) is a disputed area in the eastern sector of the China–India border, controlled by China but claimed by India. The village of Longju is located in the Tsari Chu Valley 2.5 kilometres (1.6 mi) south of the town of Migyitun, considered the historical border of Tibet. The area of Longju southwards is populated by the Tagin tribe of Arunachal Pradesh.

India had set up a border post manned by Assam Rifles at Longju in 1959 when it was attacked by Chinese border troops and forced to withdraw. After discussion, the two sides agreed to leave the post unoccupied. India established a new post at Maja, three miles to the south of Longju, but continued to patrol up to Longju. After the 1962 Sino-Indian War, the Chinese reoccupied Longju and brushed off Indian protests.

Since the late 1990s and early 2000s, China has expanded further south, establishing a battalion post at erstwhile Maja. In 2020, China built a 100-house civilian village close to this location in disputed territory.