Secretary of Defense Lloyd Austin said Saturday that China's increased military activity near Taiwan seemingly indicates a "rehearsal" of the country's future intentions.

Austin made his comment during a keynote discussion with Fox News anchor Bret Baier at the Reagan National Defense Forum in Simi Valley, California.

Pointing out how China has been launching multiple air operations near Taiwan in recent months, Baier asked Austin, "Do you think that these are training flights for future operations?"

Austin noted that he didn't want to speculate, but said, "Certainly, it looks like them exploring what their true capabilities [are], and sure, it looks like rehearsal."

LLOYD AUSTIN REACTS WITH AWKWARD SILENCE WHEN ASKED IF HE HAS REGRETS ABOUT AFGHANISTAN WITHDRAWAL

FILE: In this undated file photo released by the Taiwan Ministry of Defense, a Chinese PLA J-16 fighter jet flies in an undisclosed location

FILE: In this undated file photo released by the Taiwan Ministry of Defense, a Chinese PLA J-16 fighter jet flies in an undisclosed location (Taiwan Ministry of Defense via AP)

Austin also affirmed U.S. dominance in the Pacific, telling Baier, "China is not 10 feet tall."

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"America is a Pacific power," Austin said. "The Indo-Pacific is a region of great opportunity and real challenges. One of those challenges is the emergence of an increasingly assertive and autocratic China."

Defense Secretary Lloyd Austin holds a briefing in Tbilisi on Oct. 18, 2021. (Photo by VANO SHLAMOV/AFP via Getty Images)

Defense Secretary Lloyd Austin holds a briefing in Tbilisi on Oct. 18, 2021. (Photo by VANO SHLAMOV/AFP via Getty Images)

The Reagan Forum, which comes as China and Russia continue to build up aggressive defenses not seen since World War II, included remarks by foreign policy experts and lawmakers from both sides of the aisle who argue that the Biden administration's foreign policy has diminished U.S. standing on the world stage.

"We’re facing a formidable challenge," the defense chief said. "In war and in peace we are always stronger when we work together with our friends."

Explaining that the U.S. will not force nations to choose between ties with the U.S. or China, he said the Biden administration is looking to bolster deterrence against Chinese aggression over Taiwan, not change the status quo in the region.

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Tensions between the U.S. and China have continued to escalate in the Indo-Pacific as the Chinese Communist Party (CCP) moves to "reunify" Taiwan with its mainland.

Secretary of Defense Lloyd Austin listens to a question during a media briefing at the Pentagon, Wednesday, Aug. 18, 2021, in Washington. (AP Photo/Alex Brandon)

Secretary of Defense Lloyd Austin listens to a question during a media briefing at the Pentagon, Wednesday, Aug. 18, 2021, in Washington. (AP Photo/Alex Brandon) (AP Photo/Alex Brandon)

Top experts warned at the Reagan Forum that the standing of the U.S. as the "partner of choice" among global allies has waned since the chaotic withdrawal from Afghanistan.

Fox News' Caitlin McFall contributed to this report.