The opening ceremony of the 13th China-ASEAN Expo and the China-ASEAN Business and Investment Summit is held in Nanning, capital of south China’s Guangxi Zhuang autonomous region, Sept 11, 2016.[Photo/Xinhua]

Actors perform before the opening ceremony of the 13th China-ASEAN Expo and the China-ASEAN Business and Investment Summit in Nanning, capital of south China’s Guangxi Zhuang autonomous region, Sept 11, 2016.[Photo/Xinhua]

A performance is staged during the opening ceremony of the 13th China-ASEAN Expo and the China-ASEAN Business and Investment Summit in Nanning, capital of south China’s Guangxi Zhuang autonomous region, Sept 11, 2016.[Photo/Xinhua]

A Vietnamese actress performs folk music at the 13th China-ASEAN Expo in Nanning, capital of south China’s Guangxi Zhuang autonomous region, Sept 11, 2016.[Photo/Xinhua]