Soldiers take part in a biological and chemical warfare drill during the annual Han Kuang military drill in Tainan, Taiwan, September 13, 2021. REUTERS/Ann Wang

Soldiers take part in a biological and chemical warfare drill during the annual Han Kuang military drill in Tainan, Taiwan, September 13, 2021. REUTERS/Ann Wang

Soldiers take part in a biological and chemical warfare drill during the annual Han Kuang military drill in Tainan, Taiwan, September 13, 2021. REUTERS/Ann Wang

Soldiers take part in a biological and chemical warfare drill during the annual Han Kuang military drill in Tainan, Taiwan, September 13, 2021. REUTERS/Ann Wang