As National Security Advisor, Kissinger secretly visited China via Pakistan in July 1971, meeting Premier Zhou Enlai to lay groundwork for relations.
President Nixon met Chairman Mao and Zhou Enlai in February 1972, producing the Shanghai Communiqué emphasizing peaceful coexistence.
President Carter established full diplomatic ties in 1979, aided by back-channel communications.
After leaving office, Kissinger continued unofficial shuttle diplomacy, transmitting messages during tense periods.
The Sino-Soviet split created an opening for US "China card" diplomacy. Taiwan and the One-China Policy were central, sensitive negotiating points.
These efforts reshaped US-China relations for decades.