when was beijing made the capital of china
History of Beijing The city of Beijing has a long and rich history that dates back over 3,000 years.[10][11] Prior to the unification of China by the First Emperor in 221 BC, Beijing had been for centuries the capital of the ancient states of Ji and Yan. During the first millennia of imperial rule, Beijing was a provincial city in northern China. Its stature grew in the 10th to the 13th centuries when the nomadic Khitan and forest-dwelling Jurchen peoples from beyond the Great Wall expanded southward and made the city a capital of their dynasties, the Liao and Jin. When Kublai Khan made Dadu the capital of the Mongol-led Yuan dynasty (1279–1368), all of China was ruled from Beijing for the first time. From 1279 onward, with the exception of two interludes from 1368 to 1420 and 1928 to 1949, Beijing would remain as China's capital, serving as the seat of power for the Ming dynasty (1421–1644), the Manchu-led Qing dynasty (1644–1912), the early Republic of China (1912–1928) and now the People's Republic of China (1949–present).
China–United States relations President Gerald Ford visited the PRC in 1975 and reaffirmed American interest in normalizing relations with Beijing. Shortly after taking office in 1977, President Jimmy Carter again reaffirmed the goals of the Shanghai CommuniquÃ©. Secretary of State Cyrus Vance, Carter's National Security Advisor Zbigniew Brzezinski, and senior staff member of the National Security Council Michel Oksenberg encouraged Carter to seek full diplomatic and trade relations with China. Although Brzezinksi sought to quickly establish a security relationship with Beijing to counter the Soviet Union, Carter sided with Vance in believing that such a deal would threaten existing U.S.-Soviet relations, including the SALT II negotiations. Thus, the administration decided to cautiously pursue political normalization and not military relations.[90] Vance, Brzezinski, and Oksenberg traveled to Beijing in early 1978 to work with Leonard Woodcock, then head of the liaison office, to lay the groundwork to do so. The United States and the People's Republic of China announced on December 15, 1978 that the two governments would establish diplomatic relations on January 1, 1979.