Soldiers wearing chemical suits use chemical accident detection box to check the air quality and harmful substances on March 21st, 2019, in order to provide first-hand data for the next rescue work. They are assigned to the engineer and anti-chemical detachments under the Armed Police Force（APF）in east China's Jiangsu Province. They took part in the disaster relief operations of the chemical plant blast in Yancheng City on March 21st, busy scrutinizing the damaged chemical plants for possible toxic substance leaks and assisting relevant departments in cleaning up the site. (eng.chinamil.com.cn/Photo by Cui Yongle and Chen Jingxiong)