Sino-Soviet Treaty of Friendship, Alliance and Mutual Assistance

Negotiations in Moscow

Mao Zedong arrived in Moscow in December 1949 for his first meeting with Stalin — and his first trip abroad. Negotiations were tense. Stalin was wary of a powerful Chinese communist state and initially offered only a limited friendship treaty. After weeks of difficult talks, the two sides signed the Treaty of Friendship, Alliance and Mutual Assistance on February 14, 1950. The Soviet Union agreed to provide a $300 million loan, technical experts, and to return the Chinese Changchun Railway and Port Arthur to Chinese control.

Strategic Implications

The alliance formally aligned the PRC with the Soviet bloc at the outset of the Cold War, deepening American hostility toward Beijing. The outbreak of the Korean War months later cemented this alignment: China entered the conflict partly to demonstrate its value to Moscow. In exchange, the Soviet Union accelerated the transfer of industrial technology that underpinned the First Five-Year Plan.

The Alliance Unravels

The treaty was intended to last thirty years, but the alliance collapsed within a decade. Khrushchev's de-Stalinisation, disagreements over nuclear weapons sharing, and Mao's criticism of Soviet "revisionism" led to the Sino-Soviet Split in 1960. Soviet advisors were withdrawn, blueprints taken away, and the two nations became rival communist powers — a rupture that paradoxically drove China toward rapprochement with the United States in the early 1970s.