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Co-host city of Beijing 2022 Winter Games Zhangjiakou pioneers hydrogen energy

By Zhang Zhifeng Source: People's Daily Updated: 2021-07-21

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Photo taken on June 28, 2021 shows the junction of the Beijing-Urumqi Expressway and the Zhangjiakou-Shijiazhuang Expressway in Xunhua district, Zhangjiakou, north China's Hebei province. [People's Daily Online/Chen Xiaodong]

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