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Recently, a highly popular GitHub repository — ChinaTextbook — has compiled PDF files of textbooks for all educational stages in China, from primary school, junior high school, senior high school to college. Those in need can download them directly. This is a remarkable project. In the author’s project description, the reasons for creating ChinaTextbook are mentioned: Although domestic educational websites have provided free resources, the access to information for the majority of ordinary people is still limited. Some people take advantage of this situation and sell these resources with private watermarks on Taobao. To address this issue, I plan to centralize and open-source these resources to promote the popularization of compulsory education and eliminate educational poverty between regions. ...