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Photo taken on Dec. 12, 2019 shows the Lihuading tunnel of Beijing-Shenyang high-speed railway in Beijing, capital of China. (Xinhua/Ju Huanzong)
Photo taken on Dec. 12, 2019 shows the Lihuading tunnel of Beijing-Shenyang high-speed railway in Beijing, capital of China. (Xinhua/Ju Huanzong)