BEIJING, June 28, 2016 (Xinhua) -- Chinese peacekeepers, who were injured in a terrorist attack in Mali last month, are greeted after returning to Beijing, capital of China, June 27, 2016. Four injured Chinese peacekeepers, with two in serious conditions, returned to Beijing on Monday. Chinese UN peacekeeping soldier Shen Liangliang, 29, was killed in the terrorist attack on the night of May 31 in the northern Malian town of Gao, when a vehicle-borne improvised explosive device was detonated at a United Nations camp. (Xinhua/Zhang Lupeng)