Chinese and Serbian police officers attend a launching ceremony of their first joint patrol in Belgrade, Serbia, Sept 18, 2019. The first joint patrol of Chinese and Serbian policemen was presented to the public in downtown Belgrade on Wednesday. Serbian Interior Minister Nebojsa Stefanovic explained that the police officers will conduct joint patrols at several locations in the city that are considered either tourist attractions or important locations for Chinese citizens in order to make communication easier for them. (Photo by Nemanja Cabric/Xinhua)