Aerial photo shows workers paving sand barriers to prevent and control desertification in Kubuqi desert in north China's Inner Mongolia Autonomous Region on March 13, 2020. Recently, people here resumed their work to pave sand barriers for more than 11,000 mu (some 733 hectares) of Kubuqi desert to fix the sands, preparing for the plantation of psammophyte. (Xinhua/Xu Qin)