They are a group of grandparents full of knowledge and life experience. They are also teachers and academicians. They teach the core knowledge humorously in the online classroom live broadcast room. Astronomy, physics, literature, aesthetics, classrooms without walls, and universities without thresholds, these grandparents are humorously teaching hard-core knowledge in the online classroom live broadcast.

They are teachers and academicians. They teach young people what they have learned all their lives through the Internet and sow the seeds of knowledge with patience day after day.

Ouyang Zhiyuan: Chief scientist of China's lunar exploration project and academician of China Academy of Sciences. Wang: Professor of Tongji University, marine geologist and academician of China Academy of Sciences. Wang Guangjie: Retired electrician teacher. Wu: Retired professor of Tongji University. Liu Guanzhong: Professor of Arts and Doctoral Supervisor in Tsinghua University. Muming Poo: Divine biologist and academician of China Academy of Sciences. Zheng Weimin: Professor Tsinghua University, Academician of China Academy of Engineering. Yang: Retired primary school Chinese teacher. Don: Retired physics teacher. Shu Degan: Paleontologist and Academician of China Academy of Sciences. Dai Jianye: Professor, School of Literature, Huazhong Normal University. Chu Junhao: Researcher, Shanghai Institute of Technical Physics, Chinese Academy of Sciences; Dean of Photoelectric Research Institute of Fudan University; Academician of China Academy of Sciences. Wang Yusheng: former curator of China Science and Technology Museum, doctor, professor and doctoral supervisor of China Academy of Sciences.