Students view a diesel locomotive in Jinan, East China's Shandong province, Aug 21, 2018. The Jinan Locomotive Depot on Tuesday promoted to primary school students knowledge of the history of Chinese modern railway development to enrich their summer vacation. [Photo/Xinhua]

Students view a diesel locomotive in Jinan, East China's Shandong province, Aug 21, 2018. The Jinan Locomotive Depot on Tuesday promoted to primary school students knowledge of the history of Chinese modern railway development to enrich their summer vacation. [Photo/Xinhua]

Students get a stimulated driving experience of a bullet train in Jinan, East China's Shandong province, Aug 21, 2018. The Jinan Locomotive Depot on Tuesday promoted to primary school students knowledge of the history of Chinese modern railway development to enrich their summer vacation. [Photo/Xinhua]