A formal peace deal between Beijing and Taipei should be signed to build trust before discussions on post-reunification political arrangements, a prominent Taiwanese political scientist has argued at a security conference in Beijing. Chang Ya-chung, who heads the Taiwan-based Sun Yat-sen School advocacy group, said the “one country, two systems” formula, which has been applied to Hong Kong and Macau, had so far failed to resonate in Taiwanese society. “If reunification means that one side, with...