In 20 12, after graduating from Paris Normal University, Tong Zhe gave up the opportunity to study PhD at the Federal Institute of Technology in Zurich, bought a plane ticket to return to China without telling his parents, and founded Wanmen University, the first online university in China. At the beginning of the establishment of Wanmen University, Tong Zhe's idea was to start with his most familiar physics courses and record all the videos of undergraduate and master's physics courses within one year, striving to simplify but not lose the scientific beauty of physics. The early Wanmen University was supported by many friendly people and recorded many high-quality courses, such as advanced mathematics and quantum mechanics. Looking back on the difficult years when Wanmen University was founded, Tong Zhe was also very emotional.