Pupils visit the Jiaoji Railway Museum in Jinan, capital of east of China's Shandong Province, May 18, 2019. (Xinhua/Zhu Zheng)

　　A girl visits the Jiaoji Railway Museum in Jinan, capital of east of China's Shandong Province, May 18, 2019. (Xinhua/Zhu Zheng)

　　People visit the Jiaoji Railway Museum in Jinan, capital of east of China's Shandong Province, May 18, 2019. (Xinhua/Zhu Zheng)