In a surprise Sunday tweet, U.S. President Donald Trump said he supported helping the phone-maker ZTE, a Chinese tech giant which has been one of the hardest hit from U.S.-China trade tensions. “Too many jobs in China lost,” he wrote. Though Trump speaks often about bringing jobs back to America, he’s shown little concern for any labor issues in China. What sorts of labor issues does China face? And how might U.S.-China trade tensions exacerbate them?