Farid Zarif, the special representative of UN secretary-general gestures a "thumbs up" sign to members of the Chinese police riot squad during the open day of the fifth Chinese police riot squad dispatched to Liberia in Monrovia, Liberia, on July 25, 2017. The fifth Chinese police riot squad dispatched to Liberia held an open day event on Tuesday to celebrate the 90th anniversary of the founding of the People's Liberation Army (PLA) of China. (Xinhua/Zhao Xiaoxin)
