Through the online learning platform. Institutions that issue continuing education credits will stipulate that the accumulated credits within a certain period of time (for example, one or two years) are valid. You can make up the continuing education credits of previous years through the online learning platform within this time range. You can choose some well-known online learning platforms, such as Netease Cloud Classroom, Coursera and edX. Find courses related to your major, complete the course study and pass the exam, and get corresponding credits.