1. The information of continuing education courses may need to be updated regularly. If your query time is not up to date, it may be displayed as 0.

2. Sometimes continuing education courses may be held in a specific period of time. If they are not held at present during the course time, it may be displayed as 0.

3. It may be that there is something wrong with the inquired website or system, which leads to the inability to display the course information correctly.