“On Monday, US President Trump told reporters that he would impose tariffs on an additional USD 300 billion of Chinese goods if Xi Jinping doesn’t meet with him in Japan.” ~ Trivium China, June 12, 2019
Trump is doing his best to kill any chance of a trade deal. He is making it impossible for Xi to turn up for a G20 meeting. To do so would be admitting defeat. Kow-towing to Trump would totally undermine Xi’s standing in China.