Wu Yongping is one of mainland China’s leading specialists on Taiwan affairs and dean of the Institute for Taiwan Studies at Tsinghua University in Beijing. Here, he shares his views on signals from the Xi-Trump summit, and discusses peaceful reunification between the mainland and Taiwan and how it could be achieved. How should we read President Xi Jinping’s message to Donald Trump on the Taiwan question during the summit and has anything changed? Xi said that if the Taiwan question is...