when were relations normalized between China and the U.S.?

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During Jimmy Carter's presidency, the most dramatic moment in Sino-American relations occurred on December 15, 1978, when, following months of secret negotiations, the United States and the People's Republic of China (PRC) announced that they would recognize one another and establish official diplomatic relations.

China Policy - Office of the Historian

Office of the Historian (.gov)

https://history.state.gov › milestones › china-policy