BEIJING, CHINA - DECEMBER 5: Canadian and Chinese flags are seen prior to the meeting between Canadian Prime Minister Justin Trudeau and Chinese President Xi Jinping at the Diaoyutai State Guesthouse on December 5, 2017, in Beijing, China. A group of former diplomats and academics have signed an open letter to Chinese President Xi Jinping calling for the release of two Canadians who have been detained on allegations of espionage. (Photo by Fred Dufour-Pool/Getty Images)
