Chinese Consulate General in Los Angeles on Monday slammed Taiwan leader Tsai Ing-wen's so-called transit in the U.S. and warned the U.S. side to stop all forms of official interaction with China's Taiwan region.

A spokesperson made the remarks when responding to a question about Tsai's "transit." It is reported U.S. House Speaker Kevin McCarthy and other U.S. officials may also meet Tsai during her so-called stopover.

There is but one China in the world and Taiwan is an inalienable part of China's territory, the spokesperson reiterated.

The spokesperson noted the government of the People's Republic of China is the sole legal government representing the whole of China, which has been clearly recognized by United Nations General Assembly Resolution 2758 of 1971, adding this is also a clear commitment the U.S. made in the three China-U.S. joint communiques.

In recent years, the U.S. leaders have openly indicated that the U.S. does not support "Taiwan independence," "two Chinas" or "one China, one Taiwan," the spokesperson added.

The consulate general also said the Chinese side firmly opposes any visit by leader of the Taiwan authorities to the U.S. in any name or under whatever pretext and firmly opposes the U.S. having any form of contact with the Taiwan authorities, which violates the one-China principle.

Calling Tsai's so-called transit a political stunt, the spokesperson pointed out her trip is not so much a "transit," but an attempt to seek breakthroughs and propagate "Taiwan independence."

In spite of China's serious representations and repeated warnings, the U.S. side insisted on arranging Tsai's "transit" and connived to support the Taiwan authorities' "independence seeking" actions, the spokesperson stressed, adding the Chinese side has lodged solemn protest and strong condemnation to the U.S.

Noting McCarthy is the leader of the U.S. Congress and the number three figure in the U.S. government, the spokesperson said in whatever capacity and in whatever name he meets with Tsai, it is yet another serious violation of the one-China principle and the provisions of the three China-U.S. joint communiques.

This will greatly hurt the national feelings of the 1.4 billion Chinese people, send a serious wrong signal to "Taiwan independence" separatist forces and have a severe impact on the political foundation of China-U.S. relations, the spokesperson said.

This is not conducive to regional peace and security, and is not in the common interest of the Chinese and U.S. peoples, the spokesperson added.

The consulate general warned McCarthy not to repeat disastrous past mistakes, saying China will closely monitor the developments and firmly defend national sovereignty and territorial integrity.

"The historical ins and outs of the Taiwan question are crystal-clear, so are the facts and status quo that the two sides of the Taiwan Straits belong to one and the same China," said the spokesperson, adding "the Taiwan question is the very core of China's core interests, the bedrock of the political foundation of China-U.S. relations, and the first red line that must not be crossed in the relationship."

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The spokesperson urged the U.S. side to stop upgrading its substantive exchanges with the region and stop containing China with the Taiwan question.

Realizing the complete reunification of the motherland is determined by the general trend of Chinese history as well as the common will of all Chinese people, the spokesperson said.

The moves of "Taiwan independence" separatists, including Tsai, go against the historical trend, the spokesperson stressed and added relying on the U.S. to seek "Taiwan independence" or become pawns of some forces to contain China with the Taiwan question will all end up in failure and will be convicted by history.

The Chinese consulate general also called on peace-loving and justice-minded friends from all walks of life to resolutely oppose any wrongdoing that undermines China-U.S. relations and peace and stability in the Taiwan Straits, and jointly safeguard the healthy and stable development of China-U.S. relations and the fundamental interests of the two peoples.