In May this year, Donald Trump flew to Beijing. This week, Xi Jinping returns the favour. The Chinese leader arrives in the United States on a state visit, with the two presidents set to meet on September 24. This is their second summit in under five months, and quite possibly not their last this year. But what exactly is happening between these two countries? Because on the one hand, Washington and Beijing seem to be finding ways to manage their differences. On the other, th