Taiwan is watching the coming summit between US President Donald Trump and Chinese leader Xi Jinping with unease, concerned that any discussions over arms sales could see the island used as leverage in a broader Sino-American deal. Trump arrives in Beijing on Wednesday for a three-day state visit. According to the White House, the engagements will include a bilateral meeting with Xi and a state banquet on Thursday, as well as a working lunch before Trump departs on Friday. Speaking at the White...