Nikita Khrushchev’s closed-session denunciation of Stalin at the CPSU 20th Congress helped launch de-Stalinization and sharpened Beijing’s concerns about Soviet ideological “revisionism,” setting the stage for widening Sino-Soviet disputes.
At a Moscow gathering of ruling communist parties of socialist states, including the CPC and CPSU, participants adopted a joint declaration—an important reference point later invoked during the Sino-Soviet ideological dispute.
The PRC’s renewed bombardment of Jinmen (Quemoy) and Mazu (Matsu) triggered the Second Taiwan Strait Crisis. Soviet caution and the broader Cold War context contributed to Chinese perceptions that Moscow was an unreliable partner in confrontations with the United States and its allies.
Amid mounting mistrust, the Soviet leadership unilaterally cancelled the nuclear-sharing arrangement with China (signed in 1957), intensifying Chinese efforts to pursue an independent nuclear deterrent and widening the strategic dimension of the split.
Nikita Khrushchev visited Beijing for the PRC’s 10th anniversary celebrations, but the meeting underscored deteriorating personal and political relations between the top leaderships, with disagreements over strategy toward the West and communist “orthodoxy.”
The Soviet Union recalled its experts from China, a major rupture in technical cooperation that disrupted industrial and defense projects and symbolized the conversion of party disagreements into state-to-state confrontation.
A large international communist meeting in Moscow produced the "Statement of 81 Communist and Workers’ Parties" (issued December 5, 1960). While framed as a unity document, it became a key reference point as the CPC and CPSU increasingly contested leadership and doctrine.
A Chinese People’s Daily editorial publicly charged that historic “unequal treaties” had been forced on China, bringing the border question into open polemics and adding territorial nationalism to the growing Sino-Soviet conflict.
The CPC Central Committee sent its letter "A Proposal Concerning the General Line of the International Communist Movement," crystallizing ideological differences with the CPSU—especially over “peaceful coexistence” and revolutionary strategy—and publicizing the dispute as a struggle over principle.
Amid escalating incidents, the sides began quiet, working-level border talks in Beijing. The discussions made little progress and underscored how the split had shifted from ideological dispute to persistent territorial-security confrontation.
Chinese and Soviet forces fought a major battle on the disputed Zhenbao (Damansky) Island on the Ussuri River, marking the most serious armed confrontation of the split and triggering a dangerous cycle of mobilization and further clashes in 1969.
Soviet troops intruded into the Tielieketi area in Xinjiang, producing another deadly border incident and reinforcing the sense in Beijing that the confrontation had become a nationwide frontier threat, not only an eastern river dispute.
Seeking to ease the military confrontation, PRC Premier Zhou Enlai met Soviet Premier Aleksei Kosygin at Beijing Airport to discuss urgent issues in relations, especially the boundary question—an important de-escalatory contact after months of fighting.
Sino-Soviet Split and Border Tensions (1956–1969)
