A worker from Ningxiang subordinated storehouse of China's state grain stockpiler Sinograin takes the e-card from the grain seller in Ningxiang, central China's Hunan Province, July 30, 2019. The e-card system has been used to improve efficiency and security. The sampling inspection is applied to ensure the quality of the grain being stored, followed by a series of advanced technologies used to keep the grain from deterioration. (Xinhua/Xue Yuge)