Yang Sen instructs his students at the robot club at Heping Primary School in Hefei City, east China's Anhui Province, Sept. 8, 2021. Yang Sen, a computer teacher from Heping Primary School, has interest in graphical language applied to robots in his spare time. After class, he organizes a robot club instructing his students to explore the use of multiple sensors and various scientific principles. (Xinhua/Zhou Mu)
