According to BusinessInsider.com:
… the Trump administration approved the sale of $2.2 billion worth of arms to Taiwan, enraging the Chinese government.
The Chinese Foreign Ministry spokesperson Geng Shuang said the sale “grossly interferes in China’s internal affairs and undermines China’s sovereignty and security interests,” the BBC reported, as the ministry called on the US to “immediately cancel” the transaction.
According to RT.com, there would be economic consequences, too.
Also, the Philippine’s President, Duterte, has called for the 7th Fleet to patrol the South Chine Sea.