Trade warMeasures against drone, rare-earth and other entities signal fresh trade tensionsChinese soldiers hold American and Chinese flags during U.S. President Donald Trump's visit to Beijing on May 14. The two sides have continued to take trade measures against each other since the summit. © ReutersBEIJING -- China on Monday announced new restrictions on exports and government procurement targeting dozens of American companies, signaling fresh trade tensions between the two economic superpower...