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Workers celebrate as they cut through the Badaling tunnel of the Beijing-Zhangjiakou high-speed rail line in Beijing, capital of China, Dec. 13, 2018. (Xinhua/Ren Chao)
Xinhua Headlines: "Jing-jin-ji": China's regional city cluster takes shape
Source: Xinhua| 2019-02-25 17:11:44|Editor: yan