System defect. Professional technicians in Ningxia have the functions of student registration, online training, course release, credit inquiry and so on, and realize efficient, accurate and dynamic service. At the same time, it provides services such as electronic library, electronic reading room, and network course center, so as to fully realize independent learning choices, teach as needed, and meet the needs of professional and technical personnel. What is missing, what to make up ",enhance the pertinence and effectiveness of continuing education, and effectively solve the contradiction between work and study. The website can't be opened when it is running, which is the cause of the system bug. Just close and reopen the website.