China issued a vague warning it will pursue "resolute countermeasures" in retaliation for a scheduled meeting between House Speaker Kevin McCarthy (R-CA) and Taiwanese President Tsai Ing-wen.

Both McCarthy and Tsai are slated to meet on April 5, when the Taiwanese president stops by Los Angeles following her trip to Latin America. China has long railed against the meeting, but McCarthy appears poised to plow ahead with the meeting nonetheless.

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“If she makes contact with U.S. House Speaker McCarthy, it will be another provocation that seriously violates the 'One China' principle," a spokesperson for China’s Taiwan Affairs Office said. "We are firmly opposed to this and will take measures to resolutely fight back."

The spokesperson did not elaborate specifics on what the retaliation could entail.

Tsai is set to stop in New York on Thursday before traveling to Guatemala and Belize. Following that, she will make a brief stop in Los Angeles and is then expected to return to Taiwan. Her trip comes in the wake of Honduras formalizing relations with China and moving to stop recognizing Taiwan as a nation. Only 13 countries, including the Vatican City, recognize Taiwan as a nation.

"I want to tell the whole world democratic Taiwan will resolutely safeguard the values of freedom and democracy and will continue to be a force for good in the world, continuing a cycle of goodness, strengthening the resilience of democracy in the world," Tsai said of her 10-day trip, Fox News reported. "External pressure will not obstruct our resolution to engage with the world."

McCarthy's predecessor, Speaker Emerita Nancy Pelosi (D-CA), visited Taiwan last year in a move that roiled Beijing and inflamed tensions. China commenced live-fire military drills around Taiwan in response.

The White House has tread carefully on McCarthy's planned visit, urging China not to overreact and refraining from condemning McCarthy.

"Taiwan’s presidents have traveled to the United States in the past. So I would refer you to Taiwan for anything specific on that," White House press secretary Karine Kean-Pierre told reporters earlier this month. "I would refer you to the speaker’s office on any potential meeting that he may be having with the president."

China has long maintained claims over sovereignty over the island state, which has been self-governed for over seven decades. Taiwan has emerged as a major flashpoint in relations between Beijing and Washington, the latter of which has pursued a policy of strategic ambiguity on Taiwan.

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The U.S. publicly adheres to the so-called One China policy but also conducts unofficial back-channel diplomacy with Taiwan. U.S. officials have vehemently opposed China retaking control of Taiwan by force and have left open the possibility of supporting Taipei City with military assistance in the event of an invasion.

Over recent months, China has increased its military deterrence against Taiwan, stepping up incursion into the island's air defense identification zone, among other onslaughts.