Major exhibition to commemorate 40th anniversary of China's reform and opening-up held in Beijing

A visitor takes photos of a model of China's self-developed shield tunneling machine at 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. The exhibition opened here on Tuesday. (Xinhua/Luo Xiaoguang)