when did the us start trade with china
China–United States relations From February 21 to February 28, 1972, President Nixon traveled to Beijing, Hangzhou, and Shanghai. At the conclusion of his trip, the US and the PRC issued the Shanghai Communiqué, a statement of their respective foreign policy views. In the Communiqué, both nations pledged to work toward the full normalization of diplomatic relations. This did not lead to immediate recognition of the People's Republic of China but 'liaison offices' were established in Beijing and Washington.[70] The US acknowledged the PRC position that all Chinese on both sides of the Taiwan Strait maintain that there is only one China and that Taiwan is part of China. The statement enabled the US and PRC to temporarily set aside the issue of Taiwan and open trade and communication. Also, the US and China both agreed to take action against 'any country' that is to establish 'hegemony' in the Asia-Pacific. On several issues, such as the ongoing conflicts in Korea, Vietnam, and Israel, the US and China were unable to reach a common understanding.[70]
Treaty ports The British established the first treaty ports in China at the conclusion of the First Opium War by the Treaty of Nanking in 1842. As well as ceding the island of Hong Kong to the United Kingdom in perpetuity, the treaty also established five treaty ports at Shanghai, Canton (Guangzhou), Ningpo (Ningbo), Fuchow (Fuzhou), and Amoy (Xiamen). The following year the Chinese and British signed the Treaty of the Bogue, which added provisions for extraterritoriality and most favoured nation status for the latter country. Subsequent negotiations with the Americans (1843 Treaty of Wanghia) and the French (1844 Treaty of Whampoa) led to further concessions for these nations on the same terms as the British.