A driver works at the cab of the bullet train D9551 on the Hangzhou-Huangshan High-speed Railway on Dec. 25. 2018. The high-speed railway was put into operation on Tuesday, linking Hangzhou, capital of east China's Zhejiang Province which is famous for the West Lake, and Huangshan, a tourist resort well-known for the Huangshan Mountain. (Xinhua/Huang Zongzhi)