An American-made E-2K early warning aircraft takes off from a motorway in Pingtung, southern Taiwan, on Sept. 15, 2021. (Sam Yeh/AFP via Getty Images)
An armed, homemade Indigenous Defense Fighter takes off from a motorway in Pingtung, southern Taiwan, during the annual Han Kuang drill. (Sam Yeh/AFP via Getty Images)
A tank prepares to take part in the annual Han Kuang live-fire drills in Hualian, eastern Taiwan, in the early hours of Sept. 14, 2021. (Military News Agency via AP)
Taiwan's annual five-day Han Guang military exercise is designed to prepare the island's forces for an attack by China, which claims Taiwan as part of its own territory. (Military News Agency via AP)
A Taiwanese soldier prepares artillery rounds for a live-fire drill to deter a coastal landing force on Sept. 15, 2021. (Military News Agency via AP)
A military jet taxis along a highway in Jiadong, Taiwan, on Sept. 15, 2021. Four military aircraft landed on the highway and took off again that day as part of Taiwan's five-day Han Guang military exercise designed to prepare the island's forces for an attack by China, which claims Taiwan as part of its own territory. (Taiwan Presidential Office via AP)
Taiwanese armored units conduct a live-fire drill to deter a coastal landing force during the Han Guang exercise held on the island of Penghu county. (Military News Agency via AP)
A Taiwanese artillery unit conducts a live-fire drill the Han Guang exercise. (Military News Agency via AP)
Taiwanese President Tsai Ing-wen, center, speaks with military personnel near aircraft parked on a highway in Jiadong, Taiwan, on Sept. 15, 2021. (Taiwan Presidential Office via AP)