Wu Qian, a spokesman from the Chinese Defense Ministry, held a news briefing and blamed the U.S. for saying "a lot of irresponsible things" on the matter, Reuters reported.
Beijing has irritated its neighbors and Western governments with an increasingly assertive foreign and military policy. Taiwan and the mainland have been ruled separately since 1949 following a civil war.
"What the U.S. did proves that the so-called democracy summit is just a pretext and tool for it to pursue geopolitical goals, suppress other countries, divide the world, serve its own interest and maintain its hegemony in the world," said Zhao Lijian, spokesperson for the Ministry of Foreign Affairs, according to the Associated Press.
Fox News' Jon Brown and the Associated Press contributed to this report