Sino-Soviet Split: How China and the USSR Became Rivals

The Sino-Soviet split was the collapse of the alliance between the People’s Republic of China and the Soviet Union, which grew from disagreements in the late 1950s into an open break around 1960 and a full rupture by the mid-1960s. Mao Zedong’s China and Nikita Khrushchev’s USSR quarrelled over ideology, leadership of the communist movement, nuclear weapons and national interests. The split divided the communist world in two and transformed the Cold War, eventually allowing the United States to draw closer to China.

Background: the alliance of 1950

Soon after the founding of the People’s Republic of China in October 1949, Mao travelled to Moscow and, after weeks of difficult talks with Stalin, signed the Treaty of Friendship, Alliance and Mutual Assistance on 14 February 1950. The Soviet Union provided loans, weapons and thousands of advisers, and helped China build what became known as the “156 projects”, the core of its heavy industry. The two powers fought on the same side in the Korean War.

The relationship was never equal. Mao resented Stalin’s condescension and Soviet privileges in Manchuria and Xinjiang. After Stalin’s death in 1953, Khrushchev returned the naval base at Lüshun (Port Arthur) and gave more aid, and for a time relations seemed warmer than ever.

Causes of the split

The turning point was Khrushchev’s Secret Speech of February 1956. Mao, who had not been consulted, objected to the wholesale attack on Stalin, which also threatened his own authority, and to the doctrine of “peaceful coexistence” with the capitalist West. Chinese leaders believed Moscow was going soft on imperialism, while Soviet leaders thought Mao reckless, especially after he suggested at a Moscow conference in November 1957 that China could survive a nuclear war.

Military and nuclear questions sharpened the conflict. In October 1957 Moscow agreed to help China develop nuclear weapons. In 1958 Soviet proposals for a joint long-wave radio station and joint submarine fleet struck Mao as an attack on Chinese sovereignty, and he angrily rejected them during Khrushchev’s visit to Beijing from 31 July to 3 August 1958. Weeks later China began shelling the islands of Jinmen (Quemoy) in the Taiwan Strait without informing Moscow in advance.

Domestic policy added to the strains. Soviet leaders were openly sceptical of the Great Leap Forward, launched in 1958, and its claim to reach communism faster than the USSR. In June 1959 Moscow suspended its help with the atomic bomb, and in the Sino-Indian border dispute of that year it stayed neutral rather than backing China.

The open break of 1960

In April 1960, for Lenin’s 90th birthday, Chinese party journals published an article titled “Long Live Leninism!”, attacking Soviet policy without naming Khrushchev directly. At a meeting of communist parties in Bucharest in June 1960, Khrushchev and the Chinese delegation clashed openly.

In July 1960 Moscow ordered all its technical advisers home. Around 1,400 experts left China within weeks, taking blueprints with them and leaving hundreds of projects unfinished, at a time when China was entering the worst famine of its history. A conference of 81 communist parties in Moscow in November 1960 patched over the quarrel, but only briefly.

The loss of Soviet help hurt China’s economy and its scientific programmes, but it also fed a powerful sense of grievance. Chinese propaganda later blamed the withdrawal of experts, alongside natural disasters, for the hardships of the famine years, and the episode became a lasting symbol of Soviet betrayal. China pressed on with its nuclear programme alone, a decision that led to its first atomic test in 1964.

From quarrel to rivalry

In 1961 Albania sided with China and broke with Moscow. In 1962 China criticised Khrushchev both for placing missiles in Cuba and for withdrawing them. In 1963 the dispute became a public battle of documents: a Chinese letter of June 1963 setting out a “general line” for the communist movement, a Soviet “Open Letter” in reply, and a series of nine Chinese commentaries condemning Soviet “revisionism”. China denounced the Partial Test Ban Treaty signed by the USSR, the United States and Britain that year.

Khrushchev was removed from power in October 1964, the same week China exploded its first atomic bomb, but his successors did not repair relations. In 1966 the Chinese Communist Party refused to attend the Soviet party congress, ending party-to-party relations, and the Cultural Revolution brought violent protests outside the Soviet embassy in Beijing.

Key people

• Mao Zedong (1893–1976), leader of the Chinese Communist Party, who rejected Soviet leadership of world communism.
• Nikita Khrushchev (1894–1971), Soviet leader whose de-Stalinisation and foreign policy Mao attacked.
• Zhou Enlai (1898–1976), Chinese premier, who led many of the negotiations with Moscow.
• Deng Xiaoping (1904–1997), General Secretary of the Chinese party, who headed Chinese delegations in the polemics of the early 1960s.
• Mikhail Suslov (1902–1982), the Soviet party’s chief ideologist, who led the Soviet side in the doctrinal dispute.

Interpreting the split

Historians have long debated whether ideology or national interest mattered more. Lorenz Lüthi and others, using Chinese and Eastern European archives opened after the Cold War, emphasise ideology: Mao genuinely believed Khrushchev had betrayed revolutionary principles, and the disputes over de-Stalinisation and peaceful coexistence were real. Others stress older themes: Chinese memories of unequal treaties imposed by tsarist Russia, rivalry for leadership in Asia, and the difficulty of two large powers sharing leadership of one movement.

Domestic politics also played a part. Mao used the struggle against Soviet “revisionism” to strengthen his own position at home after the disaster of the Great Leap Forward and to attack colleagues he suspected of favouring a Soviet-style course. In Moscow, Khrushchev’s handling of China was among the criticisms raised against him when he was removed in 1964.

Consequences

The split broke the image of a single communist bloc. Communist parties around the world divided into pro-Soviet and pro-Chinese factions, and the two powers competed for influence in Asia, Africa and among liberation movements, including in Vietnam.

Military tension grew along the long shared border, where the Soviet Union stationed large forces. In March 1969 fighting broke out on Zhenbao Island in the Ussuri River, followed by further clashes in Xinjiang (see Sino-Soviet border conflict). Fear of the Soviet Union pushed Beijing toward Washington, and President Richard Nixon visited China in February 1972. Relations between Moscow and Beijing were normalised only in May 1989, when Mikhail Gorbachev visited Beijing.

Timeline

• 1950, 14 February: China and the Soviet Union sign a treaty of alliance.
• 1956, 25 February: Khrushchev’s Secret Speech denounces Stalin.
• 1958, July–August: Khrushchev visits Beijing; quarrels over joint military projects.
• 1959, June: The Soviet Union suspends nuclear weapons assistance to China.
• 1960, April: China publishes “Long Live Leninism!”.
• 1960, July: Soviet experts are withdrawn from China.
• 1963, June–July: The public polemic begins with rival open letters.
• 1966, March: The Chinese party refuses to attend the Soviet party congress.
• 1969, 2 March: Fighting on Zhenbao Island.

Why it matters

The Sino-Soviet split was one of the most important shifts of the Cold War. It ended the idea of a united communist world, created a three-sided rivalry between Washington, Moscow and Beijing, and made possible the opening between the United States and China in the 1970s. Its effects shaped Asian politics for decades.