1972 Shanghai Communique: US declares Taiwan is part of China (read it yourself)

[Martian]

Source Link (Taiwan Documents Project with original source from the United States Information Service): Joint Communique of the United States of America and the People's Republic of China

"12. The U.S. side declared: The United States acknowledges that all Chinese on either side of the Taiwan Strait maintain there is but one China and that Taiwan is a part of China. The United States Government does not challenge that position."