India-China relations

Early contacts

Direct ties between India and China are widely documented as early as the 2nd century bce, although some accounts suggest that contacts between the two peoples may have existed even earlier. Early cultural exchanges played a key role in molding Sino-Indian relations, particularly the spread of Buddhism from India to China. Buddhist monks, pilgrims, and scholars became some of the earliest cultural ambassadors between the two regions. The most notable travels were by Faxian and Xuanzang, two Chinese Buddhist monks who undertook arduous journeys to India to learn more about the region and its culture. Faxian visited India in the 5th century ce and stayed for about a decade, making copious written records of Indian Buddhism. After returning to China, he translated several Buddhist works written in Sanskrit into Chinese, which greatly influenced the growth of Buddhism in the region. Xuanzang traveled to India in the 7th century ce and spent about a decade studying Indian Buddhism. His translated works are a rich source of Indian Buddhist traditions and have had a major impact on the development of Chinese Buddhism.

The ancient Silk Road, a vast network of trade routes that connected China with much of the world, also played a major role in the exchange of ideas between India and China. Apart from the abundant trade of silk and spices, the Silk Road facilitated the transfer of technologies and philosophies and the interaction of Indian and Chinese peoples. Other modes of interaction include maritime trade, which is believed to have existed from ancient times. However, historians also note that early ties were not always sustained and that there were periods of limited interaction, particularly following the decline of Buddhism in India.

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Colonization and early modern history

The impact of Western colonialism was felt across both India and China. European colonial influence in India and China expanded during different periods. While European powers established a sustained presence in India as early as the late 15th century, foreign presence in China expanded during the 19th and 20th centuries. Although China was never fully colonized, parts of the region came under foreign spheres of influence, especially from the British Empire, which directed the profitable trade of opium from India to China during the 19th century. As the Qing dynasty cracked down on the opium trade, tensions flared between China and Britain, eventually resulting in a series of conflicts called the Opium Wars. Following its defeat in the wars, China was forced to cede territory and grant commercial concessions to Britain. India, on the other hand, was entirely under the control of imperial Britain, which directly influenced the region’s politics, economy, and foreign relations, among other things. Colonial policies also directly affected modern Sino-Indian bilateral ties. For instance, the McMahon Line, a disputed boundary negotiated by British officials at the end of the Shimla Convention (1913–14) to demarcate the border between India and the Chinese autonomous region of Tibet, has been a recurring source of geopolitical tension between India and China, including in the 21st century.

1947–59: Early diplomatic ties

India gained independence from Britain in 1947 and became a republic in 1950. In 1949 the Chinese Communist Party (CCP), led by Mao Zedong, established the People’s Republic of China (PRC) on October 1, after defeating the Kuomintang government of Chiang Kai-shek in the Chinese Civil War (1945–49). India recognized the PRC on December 30, 1949, becoming one of the first noncommunist governments in the world to do so, and the two countries established diplomatic relations on April 1, 1950. China’s annexation of Tibet in 1950–51 marked the first major turning point in relations between India and China. Although India viewed Tibet as a sovereign entity, it gradually accepted Chinese control over it. India’s stance became clearer in April 1954, when the two neighbors signed the Agreement on Trade and Intercourse Between Tibet Region of China and India. The agreement, which described Tibet as the “Tibet region of China,” was widely viewed as acceptance of Chinese control over Tibet. During Chinese Premier Zhou Enlai’s visit to India in June 1954, both sides signed a joint statement elaborating the Panchsheel, or Five Principles of Peaceful Coexistence:

• Mutual respect for each other’s territorial integrity and sovereignty
• Mutual nonaggression
• Mutual noninterference
• Equality and mutual benefit
• Peaceful coexistence

The 1950s were also a period of cultural warmth between China and India. Indian films, especially those of Raj Kapoor such as Awaara (1951) and Shree 420 (1955), became extremely popular in China. Political developments in China following the establishment of the CCP generated notable interest in India. Scholars such as K.M. Panikkar wrote extensively about Chinese history and historical relations between the two countries. High-level visits, including Chinese Premier Zhou’s visit to India and Indian Prime Minister Jawaharlal Nehru’s visit to China in 1954, further strengthened ties. This strengthening bond was highlighted by the popularity of slogans at the time such as “Hindi Chini bhai bhai” (Hindi: “Indians and Chinese are brothers”). Although Sino-Indian relations reached their height in the 1950s, they soon deteriorated.

1959–62: Breakdown of ties and war

India’s decision to grant asylum in 1959 to the 14th Dalai Lama—who fled Tibet along with members of his family, Tibetan officials, and monks amid a violent uprising against the CCP—angered the Chinese government, which accused India of interfering in its internal affairs and encouraging the uprising. India denied these accusations and claimed that it granted asylum to the Dalai Lama on humanitarian grounds. India eventually became home to one of the largest Tibetan diaspora communities in the world. Ties further unraveled as several border disputes emerged along the Himalayas, particularly over the Aksai Chin region in the western sector near Ladakh and the McMahon Line in the eastern sector. The boundaries, drawn by British colonial authorities, were largely accepted by India but rejected by China, which claimed that these territories were historically part of its frontier regions and rejected the validity of treaties signed before 1949. Chinese Premier Zhou wrote to Indian Prime Minister Nehru in 1959 that China considered the McMahon Line part of Britain’s “imperialist aggression” against China. Tensions were also exacerbated by frequent, and often violent, skirmishes between Chinese and Indian troops along the border. In 1961 India adopted the Forward Policy, which established a series of military outposts along the contested border, amid ongoing clashes. Despite diplomatic efforts to end the dispute, including Zhou’s visit to India in 1960 for talks with Nehru, clashes continued and eventually led to a full-blown war between the two neighbors.

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On October 20, 1962, Chinese troops launched coordinated attacks across the disputed borders in both the eastern and western sectors. Indian troops were deployed to thwart Chinese advances but were reportedly inadequately supplied, underprepared, and overwhelmed. In the eastern sector Chinese troops crossed the McMahon Line and advanced toward the North East Frontier Agency (now Arunachal Pradesh state) and parts of Assam state. In the western sector they established control over Aksai Chin and secured strategic routes connecting the Tibet and Xinjiang regions. Although Indian troops put up stiff resistance in both sectors, they lost a lot of territory, a setback that has been attributed to a lack of coordination and equipment, among other issues. Estimates of casualties from both sides were roughly in the thousands, including many prisoners of war, deaths, and injuries. China declared a unilateral ceasefire on November 21 and withdrew from the eastern sector behind the McMahon Line while retaining about 14,700 square miles (38,000 square km) of territory in Aksai Chin. The entire boundary that demarcated Indian-controlled and Chinese-controlled areas came to be known as the Line of Actual Control (LAC). Although the war lasted for only about a month, it resulted in an erosion of ties and created decade-long tensions that would occasionally flare up into violence.

1962–76: Freeze in relations

In the immediate aftermath of the war, ties between China and India were effectively frozen, as diplomatic relations were downgraded and ambassadors were withdrawn. Political and public discourse shifted from enthusiasm to mistrust. Several public opinion surveys conducted in India after the war showed declining support for China, echoing Nehru’s November 19, 1962, speech that the Chinese attack was a “severe setback” for India and that China had become an “imperialist” country by “invading” its neighbor. In China, by contrast, many viewed the war as a key victory. Border skirmishes also recurred, most notably the 1967 clashes between Chinese and Indian troops near Nathu La and Cho La, passes along the Tibet-Sikkim border, that resulted in heavy casualties. This period also marked a change in the trajectory of both countries’ foreign policy. India established deeper ties with the Soviet Union, with which China had major differences, particularly over its ideas of communism and approach to global affairs. China moved closer to Pakistan, with which India had fought a war in 1947 in Kashmir. Tensions further escalated in 1975 when China criticized Sikkim’s integration as a full state in India. Both countries had historically sought influence over Sikkim. However, after the mid-1970s, shifting regional geopolitics and domestic priorities in both countries created the conditions for a gradual improvement in relations.

1976–88: Normalization

After three wars with Pakistan, in 1947, 1965, and 1971, India showed greater interest in stabilizing relations with China. In China the end of the Cultural Revolution in 1976 and rising tensions with the Soviet Union led to a shift toward a more pragmatic foreign policy. These changing priorities created conditions for a gradual thaw in relations. In 1976 both countries reestablished ambassador-level ties after about 14 years. Relations further improved under Deng Xiaoping, who became China’s paramount leader in the late 1970s and prioritized economic modernization and stable foreign relations.

Deng’s focus on economic reform required a stable external environment, prompting China to reduce tensions with neighboring countries, including through efforts to manage its border dispute with India. Notably in 1979 and 1980, China floated the idea of a territorial swap deal, originally suggested by Zhou in 1960, under which China agreed to drop its territorial claims around the McMahon Line in exchange for India accepting the status quo in Aksai Chin. India did not accept the deal, stating that both regions were part of its sovereign territory. In 1981 China and India officially began negotiations to resolve the border dispute, which initially continued for eight rounds until 1988. Although the talks failed to reach a settlement, they helped increase cooperation in multiple avenues, including economic and cultural ties. In 1984 the two neighbors accorded each other the most-favored-nation status, which granted them equal trading privileges, following the successful negotiation of a trade agreement. However, this period was not tension-free, with occasional flare-ups of hostilities along the border. The most notable incident was the Sumdorong Chu standoff (1986–87), which coincided with China’s opposition to India’s decision to grant full statehood to Arunachal Pradesh (formerly the North East Frontier Agency) in 1987. Starting in 1986, China reportedly began deploying troops near the Sumdorong Chu valley in Tawang, Arunachal Pradesh, a move opposed by the Indian government, which deployed troops and conducted military exercises in the region, resulting in a massive standoff. Tensions continued to rise, fueling rumors of war, but eased following the visit of N.D. Tiwari, India’s external affairs minister, to China in May 1987 and both countries’ decision to initiate further talks.

1988–98: Confidence building

In 1988 Rajiv Gandhi’s landmark visit to China made him the first Indian prime minister to visit the country since Nehru’s Beijing visit in 1954. Gandhi met with Chinese officials, including Deng, Premier Li Peng, and Pres. Yang Shangkun; the Chinese foreign ministry called the visit a “major event” in bilateral ties. Notably, both sides agreed to separate the border dispute from the development of relations in other areas. As a result, a joint working group was established to facilitate discussions on the border dispute. This separation paved the way for cooperation in other areas, particularly trade. India’s implementation of economic liberalization, privatization, and globalization reforms in 1991 further bolstered trade ties. Both countries inked the Protocol on Entry and Exit Procedures for Border Trade in July 1992, which facilitated the gradual opening of trade routes along the border.

This period also saw the introduction of key initiatives for managing the border dispute, including a 1993 deal to maintain peace along the LAC and a 1996 agreement on confidence-building measures along the LAC. These agreements included measures such as maintaining peace on the border, enforcing limits on troop numbers, communication between local commanders, and preventing unilateral military action by either country. High-level visits from both sides continued during this period, including those of Chinese Premier Li (1991) and Jiang Zemin (1996), who was the first Chinese president to visit India. Indian leaders also visited China, including Pres. R. Venkataraman in 1992 and Prime Minister P.V. Narasimha Rao the following year.

1998–2017: Competitive engagement

Although ties continued to improve over the next two decades, especially economic cooperation, disagreements surfaced periodically. In May 1998 Chinese officials criticized the underground nuclear tests carried out by India in the Pokhran region in Rajasthan. China called the tests shocking and accused India of threatening regional peace. India responded by citing its “legitimate security concerns” and pointing to a “well documented” effort toward regional nuclear proliferation with foreign assistance, a possible reference to China’s alleged support to Pakistan’s nuclear program. Although China criticized Pakistan’s nuclear tests later that month, several reports have argued that China played a key role in the development of Pakistan’s nuclear program by providing technological and material assistance. However, despite tensions over the nuclear tests, bilateral engagement continued to improve.

A breakthrough in Sino-Indian relations came in 2003, headlined by Indian Prime Minister Atal Bihari Vajpayee’s visit to China. The visit saw Vajpayee meet senior Chinese officials, including Premier Wen Jiabao, Pres. Hu Jintao, and Jiang Zemin, chairman of the CCP’s Central Military Commission. The visit also marked a significant step forward for bilateral relations. India recognized Tibet as part of Chinese territory, and China, in turn, gradually moved toward acknowledging Sikkim as an Indian state by agreeing to expand border trade through Nathu La, a mountain pass in Sikkim. Later, official Chinese maps and references depicted Sikkim as part of India. Vajpayee’s visit also furthered the signing of deals in multiple areas such as culture, education, energy, science and technology, and trade. During Wen’s visit to India in 2005, the two countries elevated ties by signing the Strategic and Cooperative Partnership for Peace and Prosperity. A joint statement released during the visit noted that bilateral ties have “gained momentum” and “acquired a global and strategic character.” The visit also gave new impetus to economic ties, with both countries agreeing to rapidly increase bilateral trade, expand cooperation in economic forums such as the World Trade Organization, and establish a financial dialogue mechanism.

This period also saw several high-profile visits. Indian Prime Minister Manmohan Singh visited China in 2008 and 2013, and Chinese President Hu visited India in 2006, followed by Chinese Premier Li Keqiang in 2013 and Hu’s successor, Xi Jinping, in 2014. Additionally, multilateral cooperation expanded during the 2000s and 2010s through forums such as BRICS and the Shanghai Cooperation Organization (SCO). Within BRICS, India and China cooperated on several issues, including reforming global financial institutions and promoting global noninterventionism. Through the SCO the two countries engaged on issues such as regional security, counterterrorism, and Eurasian connectivity. Despite this growing cooperation, differences persisted. Following the Mumbai terrorist attacks of 2008, India submitted a proposal to the United Nations Security Council (UNSC) to designate the Jaish-e-Mohammed chief Masood Azhar a global terrorist. The Indian government has long maintained that Azhar is backed by Pakistan. However, China repeatedly blocked the proposal.

Changes in leadership in both countries ushered in a new strategic outlook in bilateral ties. The ascension of Xi Jinping to the Chinese presidency in 2013 is widely believed to have introduced a more forward-looking and assertive Chinese foreign policy. In India the election of the Bharatiya Janata Party (BJP) in 2014 and the appointment of Narendra Modi as prime minister reportedly brought greater emphasis on India’s strategic and security posture toward China. Although bilateral engagement expanded, underlying tensions continued to surface throughout the period. Periodic standoffs near border areas disrupted relations, including reports of incursions and confrontations between Indian and Chinese troops in the disputed regions of Depsang in 2013 and Chumar in 2014, both in Ladakh. China’s policy of issuing stapled visas—a type of visa that is stapled to a passport and not directly stamped—to some residents of the Indian states of Jammu and Kashmir and Arunachal Pradesh was protested by the Indian government. In 2012, after China issued passports containing a map depicting Aksai Chin and Arunachal Pradesh as its territory, the Indian embassy in Beijing responded by stamping visas for Chinese nationals with a map showing the two regions as part of India.

India expressed concerns about China’s increasing ties with Pakistan during this period, particularly following the inauguration of the China-Pakistan Economic Corridor (CPEC), an extension of China’s flagship Belt and Road Initiative, in 2015. The construction of CPEC, which connects the Pakistani port city of Gwadar in Balochistan with Xinjiang, was criticized by the Indian government because it passes through the disputed Gilgit-Baltistan region in Pakistan-administered Kashmir. In 2016 China blocked India’s bid to become a member of the Nuclear Suppliers Group, an international organization that regulates the transfer of civilian nuclear technology, arguing that India was not a member of the Nuclear Non-Proliferation Treaty. India expressed concern over China’s role in combating terrorism after the latter once again blocked India’s proposals to the UNSC to designate Masood Azhar as a terrorist in 2016 and 2017. Although China eventually supported Azhar’s designation as a global terrorist in 2019, it continued to block Indian-backed proposals to designate other militants as global terrorists.

Cultural exchanges also expanded during this period. Indian films, particularly those starring actor Aamir Khan, gained widespread popularity in China. The country became one of Bollywood’s largest overseas markets during the 2010s. Chinese audiences contributed to the success of several Indian films, including Dangal (2016; “Wrestling Arena”) and Secret Superstar (2017), both starring Khan.

Relations after 2017: Strategic competition and border skirmishes

Ties further deteriorated in June 2017, when Chinese and Indian troops clashed in the Doklam region, claimed by both Bhutan and China, after China’s People’s Liberation Army attempted to construct a road near the Bhutan-China-India tri-junction. India intervened by sending troops in support of Bhutan, citing its close relationship with the country under the India-Bhutan Friendship Treaty, which emphasizes peaceful and strategic cooperation. The border confrontation continued for 73 days, with occasional clashes that left soldiers on both sides injured. Both countries agreed to disengage in August following several rounds of talks, and they subsequently made efforts to improve relations, resulting in two major summits. In April 2018 Xi and Modi met in the Chinese city of Wuhan to discuss improving bilateral ties, including increasing strategic communication and preventing further border skirmishes. The following year they met in the Indian city of Mahabalipuram, where they reaffirmed their commitment to strengthening bilateral ties, including finding what both sides called a “mutually acceptable” solution to the boundary dispute.

In November 2017 India, Australia, Japan, and the United States revived the Quadrilateral Security Dialogue, or the Quad, an informal strategic grouping widely viewed as a response to China’s expanding footprint in the Indo-Pacific region. China protested the group’s revival, and some Chinese analysts described it as an “Asian NATO.”

Tensions erupted in May 2020 when Indian and Chinese troops violently clashed at multiple points along the LAC, including near Pangong Tso, Chushul, Gogra, Hot Springs, and the Galwan river valley in the Ladakh region. Additional confrontations and standoffs also occurred in Sikkim. India and China accused each other’s troops of constructing infrastructure and intruding into their respective territories. The clashes soon developed into a prolonged military confrontation along the LAC, with several soldiers on both sides killed and injured. Clashes involved hand-to-hand combat and the use of improvised weapons such as clubs and rods as a result of the 1996 confidence-building agreement, which prevented the use of firearms within 1.2 miles (2 km) of the LAC. Although military and diplomatic talks resulted in a disengagement of troops between 2021 and 2024, relations spiraled downward. India increased troop deployments along the LAC, restricted Chinese investments in the country, and banned hundreds of Chinese apps, including TikTok. China also increased military activity along the LAC. Furthermore, people-to-people exchanges took a hit as both countries imposed restrictions on direct flights and the issuance of visas. Public opinion in India about the Chinese government and its policies was the lowest since the Sino-Indian War of 1962, and the Chinese public’s view of India dipped significantly as well. India and China established several military and diplomatic mechanisms to contain the fighting. In October 2025 India and China resumed direct flights, and their respective carriers gradually announced routes between different destinations in the following months. The COVID-19 pandemic also accelerated efforts by several countries and companies to diversify global supply chains away from China. India sought to position itself as an alternative manufacturing hub through initiatives such as the Production Linked Incentive scheme and the expansion of the Make in India program, which offered incentives to companies to establish or expand manufacturing in India.

Disagreements over Arunachal Pradesh also continued to strain bilateral ties. China, which does not recognize the McMahon Line, claims Arunachal Pradesh as part of its territory in southern Tibet and officially refers to the region as “Zangnan” or “South Tibet.” The Chinese government has continued to release lists of standardized Chinese names for locations in Arunachal Pradesh since 2017, including a sixth batch of renamed locations in 2026. The Indian government has rejected these moves, asserting that Arunachal Pradesh is an integral part of India. In August 2026 the Indian government formally identified 27 places and geographical features by standardized names in official Survey of India maps. China criticized the move as a unilateral administrative action that could complicate efforts to manage the border dispute.