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Aerial photo taken on Dec. 25, 2018 shows the bullet train D9551 running on the Hangzhou-Huangshan High-speed Railway in Jiande City, east China's Zhejiang Province. 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/Xu Yu)