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Aerial photo taken on April 4, 2019 shows cranes to be adjusted at the Xuzhou Construction Machinery Group Co., Ltd. in Xuzhou, east China's Jiangsu Province. (Xinhua/Li Xiang)
 
 
Aerial photo taken on April 4, 2019 shows cranes to be adjusted at the Xuzhou Construction Machinery Group Co., Ltd. in Xuzhou, east China's Jiangsu Province. (Xinhua/Li Xiang)