Chinese Vice Premier Liu Yandong (C, front) and guests pose for a group photo before the opening ceremony of the first Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. (Xinhua/Fan Peishen)

Chinese Vice Premier Liu Yandong addresses the opening ceremony of the first Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. (Xinhua/Chen Bin)

Guests visit an exhibition during the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition presented some 8,000 exhibits on the cultural achievements of more than 60 countries along the Belt and Road. (Xinhua/Fan Peishen)

Guests visit an exhibition during the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition presented some 8,000 exhibits on the cultural achievements of more than 60 countries along the Belt and Road. (Xinhua/Chen Bin)

A guest takes photos at an exhibition during the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition presented some 8,000 exhibits on the cultural achievements of more than 60 countries along the Belt and Road. (Xinhua/Chen Bin)

Guests visit an exhibition during the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition presented some 8,000 exhibits on the cultural achievements of more than 60 countries along the Belt and Road. (Xinhua/Fan Peishen)

A guest visits an exhibition during the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition presented some 8,000 exhibits on the cultural achievements of more than 60 countries along the Belt and Road. (Xinhua/Chen Bin)

Yim Chhay Ly, Deputy Prime Minister of Cambodia, delivers a speech at a summit of the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition started in Dunhuang on Tuesday. (Xinhua/Fan Peishen)

Jean-Pierre Raffarin, representative ofFrance, delivers a speech at a summit of the 1st Silk Road (Dunhuang) International Cultural Expo in Dunhuang, northwest China's Gansu Province, Sept. 20, 2016. The exhibition started in Dunhuang on Tuesday. (Xinhua/Fan Peishen)