<P> Relations with China began under George Washington , leading to the 1845 Treaty of Wangxia . The United States was allied to the Republic of China during the Pacific War , but broke off relations with China for 25 years when the communist government took over , until Richard Nixon 's 1972 visit to China . Since Nixon , every successive U.S. president has toured China . Relations between the two countries have generally been stable with some periods of open conflict , most notably during the Korean War and the Vietnam War . Currently , China and the United States have mutual political , economic , and security interests , including but not limited to the proliferation of nuclear weapons , although there are unresolved concerns relating to the role of democracy in the government in China and human rights in both respective countries . Relations with China have strained under Barack Obama 's Asia pivot strategy , ongoing maritime disputes in the South China Sea , and a trade war in 2018 . </P>
<P> Relations with China began under George Washington , leading to the 1845 Treaty of Wangxia . The United States was allied to the Republic of China during the Pacific War , but broke off relations with China for 25 years when the communist government took over , until Richard Nixon 's 1972 visit to China . Since Nixon , every successive U.S. president has toured China . Relations between the two countries have generally been stable with some periods of open conflict , most notably during the Korean War and the Vietnam War . Currently , China and the United States have mutual political , economic , and security interests , including but not limited to the proliferation of nuclear weapons , although there are unresolved concerns relating to the role of democracy in the government in China and human rights in both respective countries . Relations with China have strained under Barack Obama 's Asia pivot strategy , ongoing maritime disputes in the South China Sea , and a trade war in 2018 . </P>
when did the united states start trading with china
when did the united states start trading with china
1845
1845