Visiting Russian Foreign Minister Sergey Lavrov reacts at a joint press conference with Serbian President Aleksandar Vucic (not in the picture) in Belgrade, Serbia, on Feb. 21, 2018. The European Union (EU) will have to understand Serbia's relations with Russia, if it wishes to see it as its future member, Serbian President Aleksandar Vucic said after meeting visiting Russian Foreign Minister Sergey Lavrov on Wednesday in Belgrade. (Xinhua/Predrag Milosavljevic)