"We strongly oppose and condemn this. Taiwan is an integral part of China. The US has grossly interfered in China's internal affairs, seriously damaged China's territorial sovereignty, and threatened peace and stability in the Taiwan Strait. We call on the US to immediately cease its provocative actions," the spokesman said on WeChat.
Earlier, Taiwan's Central News Agency reported that a military plane carrying a delegation of US congressmen had landed on the island of Taiwan on Tuesday evening.