The Chinese military said Tuesday it had launched joint exercises involving its army, navy, air force and rocket force around Taiwan as a “stern warning,” days after US defense chief Pete Hegseth vowed to counter “China’s aggression” on his first visit to Asia.

The Chinese military announced large-scale drills in the waters around Taiwan on Tuesday as it again warned the self-ruled island against seeking independence. The joint exercises involve navy, air ground and rocket forces and are meant to be a “severe warning and forceful containment against Taiwan independence,

The drills came after Taiwan’s president, Lai Ching-te, announced measures to counter China’s influence and espionage. Beijing also wants to send a message to Washington, analysts said.