Zhao Jinyong (L), a member of the third Chinese peacekeeping police riot squad for mission in Liberia, is welcomed by his son and his wife upon arrival at Yaoqiang International Airport in Jinan, capital of east China's Shandong Province, March 12, 2016. A total of 140 Chinese officers and soldiers, who made up the third Chinese peacekeeping police riot squad for mission in Liberia, have returned home after a one-year UN peacekeeping mission. [Xinhua]