Why a new Pakistan-China border pact has irked India
Pakistan and China held the inaugural meeting of a Joint Boundary Commission in Islamabad in September 2026, reviving mechanisms tied to their 1963 boundary arrangement.
India formally rejected the Commission, stating it has no legal basis to make decisions concerning territory under what India calls Pakistan's illegal occupation of Jammu and Kashmir.
The move follows earlier Indian protests in January 2026 over China's infrastructure expansion, including road construction, in the Shaksgam Valley north of the Karakoram range.
India's official position, reiterated by senior military leadership, is that the underlying 1963 Sino-Pakistan Boundary Agreement is illegal and invalid, since Pakistan never had sovereign title over the territory to cede.
The development comes despite recent efforts to stabilise India-China ties along the Line of Actual Control, underscoring that Beijing's boundary position on Kashmir remains aligned with Islamabad's.
The Sino-Pakistan Boundary Agreement, 1963
Signed on 2 March 1963 between Pakistan and China, this agreement provisionally transferred an area of roughly 5,180 sq km of the Shaksgam Valley (also called the Trans-Karakoram Tract), lying north of the Karakoram range, from Pakistani administration to China. India has never recognised this transfer because the territory forms part of the erstwhile princely state of Jammu and Kashmir, which acceded to India in 1947 — meaning Pakistan held no legal title to cede it. Article 6 of the 1963 agreement itself is provisional: it commits both signatories to renegotiate the boundary once the "sovereign authority concerned" (understood to mean the resolution of the Kashmir dispute) is settled — an implicit acknowledgment that the area's final status is unresolved.
Key Details
- Area involved: Shaksgam Valley / Trans-Karakoram Tract, roughly 5,180 sq km.
- Location: north of the Karakoram range, adjacent to Pakistan-occupied Gilgit-Baltistan and close to the Siachen Glacier.
- India's stand: the agreement is illegal and invalid; India claims the entire state of Jammu and Kashmir, including Gilgit-Baltistan and the Shaksgam tract, as an integral part of India.
- Renegotiation clause: Article 6 of the 1963 pact keeps the boundary "provisional" pending settlement of the Kashmir dispute.
The 2026 Joint Boundary Commission is a fresh institutional mechanism built on this same 1963 arrangement; India's rejection reaffirms that it does not accept Pakistan or China's authority to settle matters concerning Indian-claimed territory bilaterally.
Pakistan-occupied Kashmir (PoK) and India's territorial claims
PoK refers to the parts of the former princely state of Jammu and Kashmir under Pakistani control since the 1947-48 war, comprising "Azad Kashmir" and Gilgit-Baltistan. India's Parliament, through a 1994 unanimous resolution, asserts that PoK is an integral part of India and demands its vacation by Pakistan. The Shaksgam Valley lies adjacent to Gilgit-Baltistan and was ceded by Pakistan from territory it controlled but did not legally own.
Key Details
- PoK comprises two administrative units under Pakistan: "Azad Jammu and Kashmir" and Gilgit-Baltistan.
- The Indian Parliament's 1994 resolution reaffirms PoK as Indian territory under illegal occupation.
- China's presence in Shaksgam gives it a direct physical foothold adjacent to Gilgit-Baltistan, where the China-Pakistan Economic Corridor (CPEC) also runs.
The Joint Boundary Commission effectively normalises China's administrative and infrastructural presence in territory India regards as illegally occupied, reinforcing New Delhi's concern about a China-Pakistan nexus in the western Himalayas.
Boundary terminology: LAC, LoC, and International Boundary
UPSC frequently tests the distinction between India's three border classifications. The Line of Control (LoC) separates Indian and Pakistani-held Kashmir, formalised by the Shimla Agreement of 1972 (converting the 1949 ceasefire line into the LoC) and is meant to be inviolable by either side without mutual consent. The Line of Actual Control (LAC) separates Indian and Chinese-held territory and is not a mutually demarcated boundary, being based on differing perceptions. The International Boundary (IB), such as along Punjab/Rajasthan with Pakistan, is a settled, internationally recognised border.
Key Details
- LoC: established by the Shimla Agreement, 2 July 1972, between India and Pakistan; roughly follows the 1949 Karachi Agreement ceasefire line with modifications after the 1971 war.
- LAC: ~3,488 km, undemarcated, subject to differing perceptions in sectors like Ladakh, Sikkim, and Arunachal Pradesh.
- The Shaksgam Valley lies beyond the LoC's northern terminus (NJ9842), in territory India claims but does not administer.
China's infrastructure push in Shaksgam is geographically contiguous with both the LoC's northern end and the western sector of the LAC, giving it potential dual-front military logistics value — a key reason for India's security concern.
- Shaksgam Valley / Trans-Karakoram Tract area ceded in 1963: approximately 5,180 sq km.
- Sino-Pakistan Boundary Agreement signed: 2 March 1963, in Peking (Beijing).
- India-China LAC length: approximately 3,488 km.
- Shimla Agreement (LoC formalisation between India and Pakistan): 2 July 1972.
- Indian Parliament's resolution asserting PoK as Indian territory: passed unanimously in 1994.