Leaders of Romania, Serbia, Greece, Bulgaria meet for economic cooperation

Bulgarian Prime Minister Boiko Borisov, Serbian President Aleksandar Vucic, Romanian Prime Minister Viorica Dancila, and Greek Prime Minister Alexis Tsipras (from 2nd L to 2nd R) pose for photos at a joint press conference at Victoria Palace in Bucharest, Romania, April 24, 2018. The leaders of Romania, Bulgaria, Greece and Serbia met here on Tuesday, discussing economic cooperation, concrete projects and the 16+1 cooperation format promoted by China. (Xinhua/Cristian Cristel)