When US President Richard Nixon walked down the red-carpeted stairs from Air Force One to shake hands with Chinese Premier Zhou Enlai on a cold day in Beijing on February 21, 1972, it was hailed by many as a world-changing gesture.
source https://www.cnn.com/2022/02/21/china/nixon-mao-china-50th-anniversary-intl-hnk-mic/index.html