CGTN's Wang Guan interviewed veteran US diplomat Henry Kissinger in Washington, DC and asked him about the state of US-China relations under President Donald Trump. Here's what Kissinger said the White House could learn from the Shanghai Communique, an important diplomatic document issued by the two countries on February 28, 1972 during President Richard Nixon's visit to China. That document paved the way for the establishment of diplomatic ties between China and the US.