India-China: competition, the border, and managing the dragon

India-China is the relationship New Delhi watches most closely and trusts least. The two countries share a 3,488-km Line of Actual Control that remains undefined and disputed, a trade deficit that has crossed $100 billion, and rival visions of Asia's future. As S. Jaishankar has put it, managing China demands realism, agility and strategic clarity. The border is the prerequisite: until the LAC stabilises, nothing else in the relationship moves freely.

Few bilaterals compress the whole GS-II syllabus the way this one does: boundary management through layered agreements, economic de-risking without full decoupling, water security, the China-Pakistan nexus, and multilateral coexistence in Brazil, Russia, India, China and South Africa (BRICS) and the Shanghai Cooperation Organisation (SCO). What follows maps the competition, the slow thaw since the October 2024 patrolling agreement, and India's playbook.

The long arc: Panchsheel to the LAC

India was the first non-socialist country to establish diplomatic relations with the People's Republic of China, on 1 April 1950. The 1954 Panchsheel Agreement codified five principles: mutual respect for territorial integrity and sovereignty, mutual non-aggression, mutual non-interference, equality and mutual benefit, and peaceful coexistence. The 1962 border war shattered that framework, and it was Rajiv Gandhi's 1988 visit to Beijing that reopened the relationship.

The 1990s and 2000s built a scaffolding of border agreements: the 1993 pact on maintaining peace and tranquility along the LAC, the 1996 confidence-building measures, the 2005 protocol on modalities for implementing them, and the 2013 Border Defence Cooperation Agreement. Each agreement managed the border without settling it, which is why every standoff since has been handled inside a framework designed for management, not resolution.

The boundary question, sector by sector

The western sector in Ladakh is the hardest. India follows the Johnson Line of 1865, which places Aksai Chin inside India; China follows the Macartney-McDonald Line of 1899 and has controlled Aksai Chin since 1962, occupying 38,000 sq km. The middle sector, Himachal Pradesh and Uttarakhand, is largely undisputed, with shared maps and basic agreement. The eastern sector runs along the McMahon Line drawn at the 1914 Simla Convention, which China rejects while claiming all of Arunachal Pradesh, around 90,000 sq km, as 'South Tibet'.

On the ground, the pattern is what analysts call salami slicing: dual-use border villages, roads and surveillance infrastructure that alter facts incrementally without triggering war. Friction points such as the Depsang Plains have stayed unresolved for years, and both sides now keep large permanent troop deployments facing each other across buffer zones created after the 2020-23 disengagement rounds.

Galwan and the slow thaw since 2024

The June 2020 Galwan clash ended the old normal of an un-demarcated but peaceful border. Disengagement at several friction points created buffer zones in Galwan, Gogra-Hot Springs and Pangong Tso, but Depsang and Demchok stayed frozen. The October 2024 patrolling agreement, reached on the sidelines of the Kazan BRICS summit, restored patrolling rights in those two areas to the pre-April 2020 status quo, the first genuine thaw in four years.

2025 built on it cautiously: a buffer-zone review mechanism, the 23rd round of Special Representatives' talks, and an agreed vocabulary, the '3Ds' of disengagement, de-escalation and de-induction, plus the 'three mutuals' of mutual respect, mutual sensitivity and mutual interest. Practical steps were announced alongside: resuming data-sharing on transboundary rivers and restarting the Kailash Mansarovar Yatra. The thaw is management, not settlement, and both armies remain forward-deployed.

The economic knot

The trade deficit is the relationship's other structural fact: it has crossed $100 billion, driven by Indian imports of electronics, active pharmaceutical ingredients, machinery and solar panels. By one compilation, over 98 per cent of India's imports from China are industrial goods, which makes Indian manufacturing vulnerable to supply shocks and weakens Delhi's bargaining power. Indian IT and pharma firms, meanwhile, face opaque regulatory barriers in the Chinese market.

India's response has been de-risking rather than decoupling. Investment screening for land-border countries, production-linked incentives for domestic manufacturing, and restrictions on Chinese vendors in telecom and power all aim to reduce dependence without severing a trade relationship that Indian industry still needs. The result is an uneasy equilibrium: strategic rivalry above, commercial interdependence below.

Water, CPEC and the neighbourhood

There is no water-sharing treaty between the two countries, and China stopped sharing Brahmaputra hydrological data after the 2017 Doklam standoff. Beijing's plan for a mega-dam in Medog county, near Arunachal Pradesh, gives upstream control a strategic edge that Delhi reads as potential leverage. The China-Pakistan Economic Corridor, a $62 billion project running from Kashgar to Gwadar through Pakistan-occupied Kashmir, violates India's sovereignty claim directly, while the String of Pearls network, Hambantota in Sri Lanka, Gwadar in Pakistan, Kyaukphyu in Myanmar, rings India's maritime approaches.

Multilaterally, China has used its weight to block India's rise: opposing permanent UN Security Council membership, blocking Nuclear Suppliers Group entry on NPT grounds, and repeatedly shielding Pakistan-based terrorists from UN sanctions until the Masood Azhar listing in 2019. India has answered by boycotting every Belt and Road Forum since 2017 and projecting alternatives such as the India-Middle East-Europe Economic Corridor.

Managing the dragon: India's playbook

The playbook has four tracks. Militarily, India has closed the border-infrastructure gap with all-weather roads, tunnels, the Vibrant Villages programme and rapid mobilisation capacity, while upgrading the Andaman and Nicobar Command to watch Chinese research and survey vessels. Diplomatically, the Quad and supply-chain initiatives with Japan and Australia build coalitions without a formal alliance. Economically, de-risking continues. And multilaterally, India engages China inside BRICS and the SCO, using those forums to insist on sovereignty language, as at the 2025 Tianjin SCO summit.

The through-line is what Jaishankar calls strategic clarity: compete where China coerces, cooperate where interests overlap, and never let the border's temperature dictate the entire relationship. Seventy-five years after 1950, the 'dragon-elephant tango' that Beijing has proposed remains an aspiration, not a description.

The border agreements and the Sela Tunnel moment

A 2024 flashpoint showed how infrastructure has become the language of the dispute: China protested Prime Minister Modi's visit to Arunachal Pradesh to inaugurate the Sela Tunnel at 13,000 feet, which China claims as 'South Tibet' or Zangnan. India rejected the claim, reaffirming Arunachal Pradesh as an integral part of the country.

The BRI was launched by Chinese President Xi Jinping in 2013. To connect Asia with Europe and Africa, through a network of railways, highways, ports, airports, and other infrastructure projects with the intent to promote trade, investment, and economic growth in participating countries. India opposes it because the China-Pakistan Economic Corridor passes through Pakistan-occupied Kashmir.

The boundary has its own paper trail, worth memorizing as a sequence: the 1993 Border Peace and Tranquility Agreement, the 1996 Agreement on Military Confidence-Building Measures along the LAC, the 2005 Modalities for Implementing Confidence-Building Measures in the Military Field, the 2012 agreement establishing a Working Mechanism for Consultation and Coordination on India-China Border Affairs (WMCC), and the 2013 Border Defence Cooperation Agreement (BDCA).

The vocabulary of the rivalry: the 'Five Finger Policy' framing of China's Tibet-centered territorial approach; 'salami slicing', the incremental encroachments (including hundreds of border villages in Tibet) used to assert claims; and 'hometown diplomacy', the two informal summits at Wuhan and Chennai. On the law of the sea, China rejects the 2016 UNCLOS tribunal ruling in the Philippines case, which India upholds as the basis for a rules-based order.

The LAC paper trail

What examiners keep asking

• Always separate management from resolution: every border agreement since 1993 manages the LAC; none settles it.
• For economy questions, use the de-risking frame: dependence is the fact, decoupling is not the policy.
• Link the neighbourhood to the border: CPEC, the String of Pearls and the Brahmaputra dam are one encirclement argument.

Key Terms

• Border Defence Cooperation Agreement (2013): The India-China BDCA setting protocols for troops facing each other along the LAC.
• India-Middle East-Europe Economic Corridor: The India-Middle East-Europe Economic Corridor (IMEC) is a multi-modal connectivity initiative announced through a memorandum at the G20 Summit in New Delhi in September 2023. Signed by India, the US, Saudi Arabia, the UAE, France, Germany, Italy, and the EU, it has an eastern corridor (India to the Gulf) and a northern corridor (the Gulf to Europe), combining ports, railways, energy lines, and undersea cables. For UPSC, IMEC is India's flagship alternative to China's Belt and Road Initiative. The corridor would link Indian ports by sea to Gulf ports such as Fujairah, then by rail through Saudi Arabia and Jordan to Israel's Haifa port and onward to Europe.
• Border Defence Cooperation Agreement: The Border Defence Cooperation Agreement (BDCA) is a 2013 India-China pact on managing the disputed border along the Line of Actual Control. Signed in Beijing on 23 October 2013, it builds on the 1993 and 1996 agreements by adding flag meetings, hotlines and rules to prevent patrol face-offs from escalating. For UPSC, it is a key confidence-building measure in India-China relations, relevant to questions on border management and the Galwan aftermath. The agreement signed in Beijing on 23 October 2013 in the presence of Prime Minister Manmohan Singh and Chinese Premier Li Keqiang.
• Line of Actual Control: The Line of Actual Control is the de facto, undemarcated boundary between India and China, running about 3,488 km from Ladakh through Uttarakhand and Sikkim to Arunachal Pradesh. Unlike a settled border, its exact alignment is disputed in the western (Aksai Chin), middle, and eastern (McMahon Line) sectors. It is central to GS-2 and GS-3 questions on border management, the 2020 standoff, and India-China relations. the Galwan Valley clash of June 2020
• Shanghai Cooperation Organisation: The Shanghai Cooperation Organisation is a Eurasian intergovernmental body founded in 2001 in Shanghai by China, Russia, Kazakhstan, Kyrgyzstan, Tajikistan and Uzbekistan, with India and Pakistan joining as full members in 2017. It coordinates on counterterrorism (through RATS), security, and economic connectivity. For UPSC it is central to India's multi-alignment: a platform where India engages China and Russia while balancing its Quad and Western partnerships. India chaired the SCO and hosted its 2023 summit in virtual format.
• China-Pakistan Economic Corridor: The China-Pakistan Economic Corridor is a bilateral infrastructure and connectivity programme linking Kashgar in Xinjiang to Pakistan's Gwadar port, announced during President Xi Jinping's 2015 visit to Pakistan. Envisioned as a flagship of the Belt and Road Initiative, it covers energy projects, roads, railways, and port development. For UPSC, India objects to it because it passes through Pakistan-occupied Kashmir, making it a core issue in India-China and India-Pakistan relations. The Karakoram Highway upgrade and Gwadar port development are the corridor's signature early-harvest projects.
• Nuclear Suppliers Group: The Nuclear Suppliers Group (NSG) is a 48-member export-control regime that coordinates controls on civilian nuclear material, equipment, and dual-use technology to prevent weapons proliferation. Formed in response to India's 1974 nuclear test, it first met in London in November 1975. For UPSC, the NSG matters because India, a non-NPT state, won a 2008 waiver enabling civilian nuclear trade but remains blocked from membership, largely by China. The Indo-US civil nuclear deal of 2008 led directly to the NSG's waiver for India, opening global uranium supplies for India's reactors.
• String of Pearls: The String of Pearls is a term for China's alleged network of ports and facilities across the Indian Ocean that could encircle India, from Gwadar in Pakistan to Hambantota in Sri Lanka and Kyaukphyu in Myanmar. Indian analysts use it to describe Beijing's maritime presence and dual-use infrastructure. For UPSC, it is a core IR concept for answers on India-China rivalry, maritime security and the Indo-Pacific. Hambantota port in Sri Lanka, leased to a Chinese firm for 99 years in 2017
• confidence-building measures: Confidence-building measures are deliberate steps states take to reduce mistrust and the risk of miscalculation, such as hotlines, military notifications, ceasefires, and people-to-people exchanges. India and Pakistan have used CBMs repeatedly, from the 1999 Lahore Declaration to the 2003 LoC ceasefire. For UPSC, CBMs are a staple GS-2 IR concept, illustrating how rivals manage escalation without resolving the underlying dispute. The Lahore Declaration of February 1999
• Special Representatives: Special Representatives are senior officials appointed by India and China to negotiate a political settlement of the boundary question, a mechanism created in 2003 during Atal Bihari Vajpayee's visit to Beijing. India's National Security Adviser and China's top diplomat lead the talks, following a three-step formula: political parameters (agreed in 2005), a framework, then delineation. They matter for UPSC because every recent border crisis, from Doklam to Galwan, is managed through this channel. NSA Ajit Doval's August 2025 SR talks with China's Wang Yi in Beijing.
• Security Council: Security Council is the United Nations' principal organ for maintaining international peace and security, established under the UN Charter in 1945. It has 15 members: five permanent members (China, France, Russia, the United Kingdom and the United States) wielding veto power, and ten elected non-permanent members serving two-year terms. Its resolutions are legally binding. For UPSC, it is the focal point of GS-2 questions on India's campaign for a permanent seat and UNSC reform. India's election as a non-permanent member for the 2021-22 term.
• salami slicing: Salami slicing is a strategy of achieving a large objective through a series of small, individually deniable steps, each too minor to provoke a strong response. The term comes from 'salami tactics' attributed to Hungarian communist leader Matyas Rakosi in the 1940s; in international relations it describes grey-zone coercion, including incremental territorial moves. It serves GS-2 IR and GS-3 security questions on coercion below the threshold of war. Matyas Rakosi's salami tactics, Hungary (1940s)

Practice questions

The South China Sea: India's stake in a distant sea

South China Sea is the semi-enclosed sea ringed by China, Vietnam, the Philippines, Malaysia, Brunei and Taiwan, through which a large share of India's eastbound trade sails after transiting the Strait of Malacca. India claims nothing there, but its stakes are threefold: freedom of navigation for its commerce, energy assets through ONGC Videsh's exploration blocks off Vietnam, and the credibility of the rules-based order it preaches in the Indo-Pacific.

India's position is legalist: disputes must be settled peacefully under the UN Convention on the Law of the Sea (UNCLOS), a formulation that backs the 2016 arbitral award against China's nine-dash line without India firing a rhetorical shot at Beijing. The operational layer is the Act East navy: port calls, the ASEAN-India Maritime Exercise held in the South China Sea, and defence exports like the BrahMos missiles sold to the Philippines, which put Indian hardware on the sea's contested edge.

The limits are geographic and economic. The South China Sea is a distant theatre where India cannot sustain presence the way the US or even Japan can, and the $100-billion-plus China trade relationship disciplines how loudly New Delhi speaks. So India works through ASEAN-led forums, the East Asia Summit and the ASEAN Regional Forum, letting Southeast Asian claimants lead while it supplies the legal and naval grammar.

The 'Necklace of Diamonds': countering encirclement

Necklace of Diamonds is the informal name for India's counter to China's String of Pearls: a lattice of access arrangements, logistics agreements and partnerships strung around China's maritime periphery, from the Persian Gulf to the western Pacific. Where the String of Pearls describes Chinese-built or -accessed ports from the South China Sea to the Indian Ocean (Hambantota, Gwadar, Djibouti), the Necklace describes India's answer in kind: not bases, which Indian doctrine avoids, but assured access.

The sourced nodes include Duqm in Oman, where India has secured military and logistics access guarding the Strait of Hormuz's western approaches, and Chabahar in Iran, the gateway to Afghanistan and Central Asia. The lattice extends through logistics pacts and exercises with Indo-Pacific partners, supporting the SAGAR and MAHASAGAR maritime doctrines. The honest caveat: it is an asymmetric answer, India's resources are a fraction of China's, and every node depends on a partner's domestic politics, which is why the Necklace is a hedging device, not a containment architecture.