Sailors wearing Mission-Oriented Protective Posture (MOPP) gears conduct chemical decontamination aboard the guided-missile destroyer Chengdu (Hull 120) during a 3-day maritime training exercise from November 4 to 6, 2020. The sailors are assigned to a naval vessel training center under the PLA Northern Theater Command. (eng.chinamil.com.cn/Photo by Zou Xiangmin)