Photo taken on May 26, 2018 shows the big data logo outside the venue of the China International Big Data Industry Expo in Guiyang, capital of southwest China's Guizhou Province. The expo opened here on Saturday. (Xinhua/Ou Dongqu)
In pics: view inside greenhouses in N China's Hebei
In pics: curtain wall project of sky corridor in SW China's Chongqing
Making traditional handicrafts increases income of local women in SW China's Guizhou
Over 7,000 heavy-haul freight train trips made on Watang-Rizhao Railway in 2018
Snow scenery of Washington D.C.
Frosty scenery seen in Tianjin