Aerial photo taken on May 1, 2019 shows Guanshanhu district shrouded in fog in Guiyang, southwest China's Guizhou province. [Photo by Liu Xu/xinhuanet.com]
Aerial photo taken on May 1, 2019 shows Guanshanhu district shrouded in fog in Guiyang, southwest China's Guizhou province. [Photo by Liu Xu/xinhuanet.com]
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