A long-standing border dispute between India and China has reignited, bringing the century-old McMahon Line back into sharp focus. Recent remarks from a Chinese commentator, coupled with Beijing's continued renaming of locations within India's Arunachal Pradesh, underscore the deep divisions and competing territorial claims between the two Asian powers.
The McMahon Line: A Colonial Legacy
The McMahon Line, a boundary drawn in 1914 during the Simla Convention, delineates the border between British India and Tibet. Named after British diplomat Sir Henry McMahon, who brokered the agreement, this line stretches approximately 890 kilometers along the eastern Himalayas. Today, it forms the basis of India's recognized eastern border with China, particularly in the strategically important region of Arunachal Pradesh.
India vs. China: Competing Claims
India's Position
India maintains that the McMahon Line constitutes a legally valid international boundary, inherited upon its independence. New Delhi considers Arunachal Pradesh an integral and inalienable part of the country, citing its elected governments, established Indian administrative control, and a civilian population deeply integrated into India's political framework.
China's Rejection and Claims
Conversely, China rejects the McMahon Line entirely. Beijing argues that Tibet, at the time of the Simla Convention, lacked the authority to independently sign international treaties. China claims nearly all of Arunachal Pradesh, an area of approximately 90,000 square kilometers, referring to it as "Zangnan" or "South Tibet." This territorial disagreement was a significant catalyst for the 1962 India-China war and remains a core source of friction.
The "Ganges Line" Controversy and Renaming Efforts
Victor Gao's Provocative Suggestion
Amid renewed tensions, Chinese commentator and policy analyst Victor Zhikai Gao recently questioned the legitimacy of the McMahon Line. In a controversial interview, Gao suggested that if India insists on using the "illegal" McMahon Line as the border, China could similarly draw a hypothetical "Victor Gao Line" along the Ganges River, claiming all territory north of it. While Gao does not hold an official government position, his views often reflect nationalist and strategic perspectives aligned with Beijing's broader narratives.
China's Renaming Campaign
Gao's remarks coincide with Beijing's ongoing efforts to assert its claims through symbolic actions. In May 2025, China announced Chinese names for 27 locations within Arunachal Pradesh, including mountains, rivers, residential areas, and mountain passes. This marked the fifth such renaming exercise since 2017. India's Ministry of External Affairs strongly rejected these moves, calling them "vain and preposterous" and reiterating that Arunachal Pradesh "was, is, and will always remain an integral and inalienable part of India."
Ongoing Tensions
Despite multiple rounds of military and diplomatic talks following the 2020 Galwan Valley clashes, the India-China border dispute remains unresolved. Both nations continue to maintain heavy troop deployments along the Line of Actual Control (LAC). Diplomatic engagements largely focus on preventing further escalation and restoring stability in the contested regions.