Police officers take part in a joint anti-terrorist exercise between Chinese and Laotian police in Xishuangbanna of Southwest China's Yunnan province, Sept 13, 2016. A total of 280 police officers from Yunnan's Xishuangbanna prefecture and Luang Namtha province of Laos participated in the 90-minute drill, which started at 10 am on Tuesday. [Photo/Xinhua]