China needs friends in Trump's trade war. But Xi may have to go it alone

China's leader, Xi Jinping, says he is prepared to dance if it means sidestepping some of the worst of Donald Trump's trade tariffs. Last week he sent a letter to India's president, Droupadi Murmu, urging her to join him in a tango to celebrate 75 years of ­bilateral trade. Xi said it was "the right choice" for the two countries to be "partners of mutual achievement and realise the 'Dragon-Elephant Tango'", which, he added, "fully serves the fundamental interests of both countries and their peoples." Beijing is on a wide-ranging charm offensive, aimed at redirecting its exports away from the…