Ji Jiao. Com is committed to building an online work (public service) platform for teacher training institutions at all levels. Based on the latest network technology and database technology, a distance training system suitable for students' learning, teachers' counseling and assessment, and the organization and management of training institutions has been developed, forming a basic framework of four-level management of national continuing education network, regional teachers' network, county learning and resource center and school-based training. The platform can support millions of people to study online at the same time, and has powerful functions of live video, video on demand and video interaction. At the same time, it provides powerful online examination function, which allows tens of thousands of people to take online examinations at the same time. The website has set up 10 important first-level columns such as teaching center, information center, exchange center, resource sharing, teaching and research guidance, and many auxiliary columns such as article search and online classroom, which provide principals and teachers with rich educational information, teaching experience and teaching and research guidance knowledge to meet the diversified needs of training institutions. In order to make full use of the characteristics that the Internet can interact in various ways at any time and anywhere, the National Continuing Education Network also provides various communication platforms such as education forums, teachers' blogs, principals' blogs, and courseware display. The following educational networks have met the needs of teachers' professional development in many directions and levels, and the service quality has been recognized by the majority of teachers.