The Global Times, a newspaper of China’s ruling Communist Party, said Monday that Beijing was studying both tariffs and non-tariff moves to counter Trump’s higher tariffs. Asked about that report, Foreign Ministry spokesman Lin Jian said that “China will take all necessary measures to firmly safeguard own legitimate rights and interests.” Trump earlier imposed a tariff of 10 percent on imports from China and that will rise to 20 percent beginning Tuesday. He also ended the “de minimis” loophole that exempted imports worth less than $800 from tariffs, in a blow to companies whose online sales direct to consumers had...