Tensions between the US and China have deepened since the last time a US president traveled to Beijing for a summit, in 2017. President Trump’s return to China, in a swirl of dinners and festivities, generated positive optics for host and guest alike, but brought less apparent progress on some of the biggest bilateral sticking points, from tariffs and trade to US arms sales to Taiwan. Bloomberg News Chief North Asia Correspondent Stephen Engle and White House Correspondent Courtney Subramanian