Visitors view exhibits during an exhibition on Yongle Encyclopaedia at National Library of China in Beijing, capital of China, Sept. 28, 2018. Yongle Encyclopaedia is China's first encyclopaedia compiled in the Ming Dynasty (1368-1644). The exhibition kicked off here on Friday. (Xinhua/Yin Gang)
Photo taken on Sept. 28, 2018 shows exhibits of an exhibition on Yongle Encyclopaedia at National Library of China in Beijing, capital of China. Yongle Encyclopaedia is China's first encyclopaedia compiled in the Ming Dynasty (1368-1644). The exhibition kicked off here on Friday. (Xinhua/Yin Gang)
A visitor takes photos during an exhibition on Yongle Encyclopaedia at National Library of China in Beijing, capital of China, Sept. 28, 2018. Yongle Encyclopaedia is China's first encyclopaedia compiled in the Ming Dynasty (1368-1644). The exhibition kicked off here on Friday. (Xinhua/Yin Gang)
A staff member views exhibits during an exhibition on Yongle Encyclopaedia at National Library of China in Beijing, capital of China, Sept. 28, 2018. Yongle Encyclopaedia is China's first encyclopaedia compiled in the Ming Dynasty (1368-1644). The exhibition kicked off here on Friday. (Xinhua/Yin Gang)