When US President Donald Trump hosted Chinese President Xi Jinping in the East Room, every detail of the state dinner was steeped in symbolism, with sparkling wine served as a nod to a pivotal moment in Sino-US relations and references to “ping-pong diplomacy”. The meal opened with a toast of Schramsberg Blanc de Noirs, a vineyard selected to honour the historic 1972 “Toast to Peace” shared by then US president Richard Nixon and Chinese premier Zhou Enlai, according to the first lady’s...