Seun Gong

Taiwan's defense ministry said more than 100 Chinese warplanes and nearly two dozen vessels have been detected around the island since the drills began Monday.

There were also live fire exercises and rocket launches.

Taiwan's President Lai Ching-de expressed his quote strongest condemnation and vowed to defend the sovereignty of the island.

China's foreign minister Wang Yi criticized the U.S.

arms sales and said China must strongly counter them.

He also criticized Japan, whose leader has signaled possible military intervention over Taiwan.

President Trump said to reporters Monday that he is not worried about the drills and

saying he doesn't believe China would invade Taiwan.

Seun Gong, NPR News, Seoul.