Armed policemen in Mission-Oriented Protective Posture (MOPP) gears follow poisonous gas decontamination procedures in a simulated railway carriage during a chemical defense training exercise. A chemical defense element under the Chinese People’s Armed Police (PAP) Force Tianjin Contingent conducted an emergency training exercise on April 28, 2021. (eng.chinamil.com.cn/Photo by Qian Zhiqiang)