A rigid-hull inflatable boat (RHIB) leaves the guided-missile frigate Baise (Hull 585), which acting as a merchant ship, after completing a visit, board, search and seizure (VBSS) operation during a four-day maritime fully exercising qualification test in waters of the South China Sea from May 30 to June 2, 2019. They are attached to a frigate flotilla with the navy under the PLA Southern Theater Command. (eng.chinamil.com.cn/Photo by Cai Shengqiu)