BELGRADE, June 18, 2016 (Xinhua) -- Chinese President Xi Jinping (4th L Back) and his wife Peng Liyuan (3rd L) pose for a group photo with Serbian President Tomislav Nikolic (4th R Back) and his wife Dragica Nikolic (3rd R Back) and their family members in Belgrade, Serbia, June 17, 2016. Xi Jinping met with Tomislav Nikolic in Belgrade on Friday. (Xinhua/Rao Aimin)