Chinese President Xi Jinping and his wife Peng Liyuan walk with other leaders and their spouses to the Tomb of the Unknown Soldier to lay red flowers after a commemorative event marking the 70th anniversary of the victory of the Great Patriotic War, in Moscow, Russia, May 9, 2015. Xi, hosted by Russian President Vladimir Putin, was among more than 20 leaders of countries, regions and international organizations to attend the commemorative event. (Xinhua/Zhang Duo)