Donald Trump and Xi Jinping are likely to discuss many issues as they meet this week in Beijing. But alongside trade, technology and the war in Iran, one topic of conversation will stand out – the future of Taiwan. Taiwan has long been a sensitive issue in Sino-American relations. Beijing regards the island as a breakaway province which must be reunited with the mainland. The United States has long opposed such a step. Yet in recent months, Trump has fuelled speculation that he may be ready to c