MOSCOW, July 6, 2016 (Xinhua) -- Chinese Vice Premier Liu Yandong (R) and Russian Deputy Prime Minister Olga Golodets unveil the exhibition hall at the site of the Sixth National Congress of the Communist Party of China in Moscow, Russia, July 4, 2016. China appreciates Russia's help in restoring the permanent exhibition hall, which stands as a new cultural bridge to enhance bilateral understanding and friendship, said Liu. (Xinhua/Dai Tianfang)