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![CHINA-SICHUAN-CHENGDU-YA'AN-RAILWAY-LAUNCH (CN)](137705267_15460034708341n.jpg)
A passenger prepares to get on board a bullet train of Chengdu-Ya'an high-speed railway at Chengdu West station in Chengdu, capital of southwest China's Sichuan Province, on Dec. 28, 2018. The newly-built Chengdu-Ya'an railway started operation on Friday. (Xinhua/Xue Yubin)