Visitors view the sand table of Shanghai's Lujiazui area during a major exhibition to commemorate the 40th anniversary of China's reform and opening-up at the National Museum of China in Beijing, capital of China, Nov. 14, 2018. (Xinhua/Li Xin)

Visitors look at the model of the AG600 large amphibious aircraft at a major exhibition to commemorate the 40th anniversary of China's reform and opening-up held at the National Museum of China in Beijing, capital of China, Nov. 14, 2018. The exhibition opened here on Tuesday. (Xinhua/Luo Xiaoguang)