Which one of the following is not an issue straining Indo-China relations ?

Indo-China relations are strained by several persistent issues. China's construction of dams on the Brahmaputra (Yarlung Tsangpo) in Tibet, such as the Zangmu and the proposed Motuo project, raises significant concerns in India regarding water security and ecological impact [3]. The visit of the Dalai Lama to Arunachal Pradesh is another major flashpoint, as China claims the state as 'Southern Tibet' and views such visits as a violation of its sovereignty [4]. Additionally, China's practice of issuing stapled visas to residents of Jammu and Kashmir (and previously Arunachal Pradesh) serves to challenge India's territorial integrity [t1]. In contrast, linking the Kashmir valley with the Indian Railways Network is a domestic Indian infrastructure project aimed at regional integration and development. While China may view Indian infrastructure near the border with suspicion, this specific internal connectivity project is not a recognized bilateral 'issue' straining relations in the same category as the others.

Sources

1. [1] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 16: India–Political Aspects > The Eastern Sector > p. 35
2. [3] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 38: Developments under Nehru’s Leadership (1947-64) > Foreign Policy > p. 651
3. [2] Politics in India since Independence, Textbook in political science for Class XII (NCERT 2025 ed.) > Chapter 4: Indi External Relations > The Chinese invasion, 1962 > p. 62
4. [4] https://indianexpress.com/article/india/dalai-lama-arunachal-visit-china-accuses-india-of-fuelling-tensions-4602098/