China has imposed sanctions on 20 U.S. defense companies and 10 senior executives in response to the Trump administration's approval of an $11.1 billion arms sales package to Taiwan. Beijing stated these measures, including freezing assets and barring business, are countermeasures against U.S. actions that "seriously violate the one-China principle" and "interfere in China's internal affairs." China warned that provocations on the Taiwan issue would be met with a firm response, emphasizing Taiwan is core to its interests and a "red line" not to be crossed.