Combo photo shows Yang Sen giving a computer lesson at Heping Primary School (up) and Yang Sen (2nd R) instructing 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)
