Wei Dongyi's ¥39 Math Workbook Made a Million in Four Days, Then Disappeared
Wei Dongyi, Peking University's famously ascetic math genius, listed two self-edited exercise booklets at 39.8 yuan on his Bilibili store, sold more than 26,000 copies and topped a million yuan in four days — then quietly removed the link on August 22. The vanishing act is a small, very Chinese story about what happens when a person the internet treats as above commerce is asked to sell something.











