In pics: 20th National Science and Technology Week

On August 25, the Youth Off-campus Activity Center of Luancheng District, Shijiazhuang City, Hebei Province, used the form of live broadcast of the off-campus cloud classroom to carry out the "Technology Cloud Classroom" live-stream events. Its "Cloud Classroom" organized students to carry out various interesting scientific and technological activities around the theme of "prevailing over an epidemic with science and technology, and empowering the country with innovation." (Photo by Li Mingfa/Guangming Picture)