After the founding of the People's Republic, the Chinese leadership was concerned above all with ensuring national security, consolidating power, and developing the economy. The foreign policy course China chose in order to translate these goals into reality was to form an international united front wÍÍÍÍith the Soviet Union and other socialist nations against the United States and Japan. Although for a time Chinese leaders may have considered trying to balance Sino-Soviet relations with ties with Washington, by mid1949 Mao Zedong declared that China had no choice but to "lean to one side"--meaning the Soviet side.

Soon after the establishment of the People's Republic, Mao traveled to Moscow to negotiate the 1950 Sino-Soviet Treaty of Friendship, Alliance, and Mutual Assistance. Under this agreement, China gave the Soviet Union certain rights, such as the continued use of a naval base at Luda, Liaoning Province, in return for military support, weapons, and large amounts of economic and technological assistance, including technical advisers and machinery. China acceded, at least initially, to Soviet leadership of the world communist movement and took the Soviet Union as the model for development. China's participation in the Korean War (1950-53) seemed to strengthen Sino-Soviet relations, especially after the UN-sponsored trade embargo against China. The Sino-Soviet alliance appeared to unite Moscow and Beijing, and China became more closely associated with and dependent on a foreign power than ever before.

During the second half of the 1950s, strains in the Sino-Soviet alliance gradually began to emerge over questions of ideology, security, and economic development. Chinese leaders were disturbed by the Soviet Union's moves under Nikita Khrushchev toward deStalinization and peaceful coexistence with the West. Moscow's successful earth satellite launch in 1957 strengthened Mao's belief that the world balance was in the communists' favor--or, in his words, "the east wind prevails over the west wind"--leading him to call for a more militant policy toward the noncommunist world in contrast to the more conciliatory policy of the Soviet Union.

In addition to ideological disagreements, Beijing was dissatisfied with several aspects of the Sino-Soviet security relationship: the insufficient degree of support Moscow showed for China's recovery of Taiwan, a Soviet proposal in 1958 for a joint naval arrangement that would have put China in a subordinate position, Soviet neutrality during the 1959 tension on the SinoIndian border, and Soviet reluctance to honor its agreement to provide nuclear weapons technology to China. And, in an attempt to break away from the Soviet model of economic development, China launched the radical policies of the Great Leap Forward (1958-60 see Glossary), leading Moscow to withdraw all Soviet advisers from China in 1960. In retrospect, the major ideological, military, and economic reasons behind the Sino-Soviet split were essentially the same: for the Chinese leadership, the strong desire to achiev 100e self-lf-reliance and independence of action outweighedÍÍÍÍ the benefits Beijing received as Moscow's junior partner.

During the 1960s the Sino-Soviet ideological dispute deepened and spread to include territorial issues, culminating in 1969 in bloody armed clashes on their border. In 1963 the boundary dispute had come into the open when China explicitly raised the issue of territory lost through "unequal treaties" with tsarist Russia. After unsuccessful border consultations in 1964, Moscow began the process of a military buildup along the border with China and in Mongolia, which continued into the 1970s.

The Sino-Soviet dispute also was intensified by increasing competition between Beijing and Moscow for influence in the Third World and the international communist movement. China accused the Soviet Union of colluding with imperialism, for example by signing the Partial Nuclear Test Ban Treaty with the United States in 1963. Beijing's support for worldwide revolution became increasingly militant, although in most cases it lacked the resources to provide large amounts of economic or military aid. The Chinese Communist Party broke off ties with the Communist Party of the Soviet Union in 1966, and these had not been restored by mid-1987.

During the Cultural Revolution, China's growing radicalism and xenophobia had severe repercussions for Sino-Soviet relations. In 1967 Red Guards besieged the Soviet embassy in Beijing and harassed Soviet diplomats. Beijing viewed the Soviet invasion of Czechoslovakia in 1968 as an ominous development and accused the Soviet Union of "social imperialism." The Sino-Soviet dispute reached its nadir in 1969 when serious armed clashes broke out at Zhenbao (or Damanskiy) Island on the northeast border (see fig. 3). Both sides drew back from the brink of war, however, and tension was defused when Zhou Enlai met with Aleksey Kosygin, the Soviet premier, later in 1969.

In the 1970s Beijing shifted to a more moderate course and began a rapprochement with Washington as a counterweight to the perceived threat from Moscow. Sino-Soviet border talks were held intermittently, and Moscow issued conciliatory messages after Mao's death in 1976, all without substantive progress. Officially, Chinese statements called for a struggle against the hegemony of both superpowers, but especially against the Soviet Union, which Beijing called "the most dangerous source of war." In the late 1970s, the increased Soviet military buildup in East Asia and Soviet treaties with Vietnam and Afghanistan heightened China's awareness of the threat of Soviet encirclement. In 1979 Beijing notified Moscow it would formally abrogate the long-dormant SinoSoviet Treaty of Friendship, Alliance, and Mutual Assistance but proposed bilateral talks. China suspended the talks after only one round, however, following the Soviet invasion of Afghanistan in 1979.

In the 1980s China's approach toward the Soviet Union shifted once more, albeit gradually, in line with China's adoption of an independent foreign policy and the opening up economic policy. Another factor behind the shift was the perception that, although the Soviet Union still posed the greatest threat to China's security, the threat was long-term rather than immediate. SinoSoviet consultations on normalizing relations were resumed in 1982 and held twice yearly, despite the fact that the cause of their suspension, the Soviet presence in Afghanistan, remained unchanged. Beijing raised three primary preconditions for the normalization of relations, which it referred to as "three obstacles" that Moscow had to remove: the Soviet presence in of Afghanistan, Soviet support for Vietnam's invasion of Cambodia, and the presence of Soviet forces along the Sino-Soviet border and in Mongolia. For the first half of the 1980s, Moscow called these preconditions "thirdcountry issues" not suitable for bilateral discussion, and neither side reported substantial progress in the talks.

Soviet leadership changes between 1982 and 1985 provided openings for renewed diplomacy, a 9d6 s high-level Chinese delegations attended the funerals of Soviet leaders Leonid Brezhnev, Yuriy Andropov, and Konstantin Chernenko. During this time, Sino-Soviet relations improved gradually in many areas: trade expanded, economic and technical exchanges were resumed (including the renovation of projects originally built with Soviet assistance in the 1950s), border points were opened, and delegations were exchanged regularly.

The Soviet position on Sino-Soviet relations showed greater flexibility in 1986 with General Secretary Mikhail S. Gorbachev's July speech at Vladivostok. Among Gorbachev's proposals for the Asia-Pacific region were several directed at China, including the announcement of partial troop withdrawals from Afghanistan and Mongolia, the renewal of a concession pertaining to the border dispute, and proposals for agreements on a border railroad, space cooperation, and joint hydropower development. Further, Gorbachev offered to hold discussions with China "at any time and at any level." Although these overtures did not lead to an immediate highlevel breakthrough in Sino-Soviet relations, bilateral consultations appeared to gain momentum, and border talks were resumed in 1987. In the late 1980s, it seemed unlikely that China and the Soviet Union would resume a formal alliance, but SinoSoviet relations had improved remarkably when compared with the previous two decades. Whether or not full normalization would include renewed relations between the Chinese and Soviet communist parties, as China had established with the East European communist parties, was uncertain as of mid-1987.

Data as of July 1987