Aerial photo taken on May 2, 2019 shows workers preparing to clean the glass curtain wall of a skyscraper in Zhengzhou, capital of central China's Henan Province. (Xinhua/Feng Dapeng)
Workers clean glass curtain wall of skyscraper in Zhengzhou, China's Henan
Source: Xinhua| 2019-05-03 14:40:13|Editor: mingmei
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