President Trump has enraged the Chinese Communist Party by signing legislation Thursday that will help American diplomats fight Beijing’s attempts to isolate Taiwan, a sign that antagonism between China and the United States continues to ramp up.

“We strongly urge the US to correct its mistake, refrain from implementing this act and obstructing other countries’ pursuit of relations with China,” Chinese Foreign Ministry spokesman Geng Shuang said Friday. “Otherwise, it will be met with resolute countermeasure from the Chinese side.”