Sumdorong Chu

 ( China–india Border ) 

Sumdorong Chu (; ) is a tributary of the Nyamjang Chu river that flows along the disputed Sino-Indian border between the Tsona County of Tibet and the Tawang district of Arunachal Pradesh. It originates in the Tokpo Shiri Glacier, about 7–10 kilometres east of Nyamjang Chu, and flows down to the river."Chinese troops in Kameng", The Hindustan Times, 17 July 1986, in . Its junction with Nyamjang Chu is about two kilometers to the north of that of Namka Chu, another contested river valley.

The Sumdorong Chu valley was the site of a standoff between India and China in 1986–1987 which, despite giving rise to the fears of another war, deescalated successfully. Subsequently, India and China formulated agreements for managing future border tensions.

---

Location Sumdorong Chu flows in a disputed border region between Tibet's Tsona County and Arunachal Pradesh's Tawang district. The dispute arises due to differing interpretations of where the McMahon Line lies.

China adheres to the 1914 map of the McMahon Line, which shows the border as a straight line at 27°44'30" N latitude till the range of "Menlakathong La" (roughly the modern Bum La Pass).A. G. Noorani, Perseverance in peace process, Frontline, 29 August 2003. India believes that the true border lies along the highest watershed line in the region, which is to the north of the Namka Chu and Sumdorong Chu streams. Bhuvan, Indian Geo-Platform of ISRO, search key: "Kenze Mane,ARUNACHAL PRADESH", retrieved 13 July 2020.

---

1987 standoff In 1986–87, a military standoff took in the Sumdorong Chu Valley. It was initiated by China moving a company of troops to Wangdung, a pasture to the south of Sumdorong Chu which India held to be part of its territory. The Indian troops stood their ground on the neighbouring Lungro la ridge and both the sides moved a large number of troops to the border. The crisis was diffused after the visit of Indian Foreign Minister to Beijing in May 1987.

---

See also

• Namka Chu
• McMahon Line

---

Bibliography

• M. Taylor Fravel (2025). 9781400828876, Princeton University Press. . ISBN 9781400828876
• Steven A. Hoffmann (2025). 9780520065376, University of California Press. . ISBN 9780520065376

Post Comment