The north extranet course was created well before 2010, and our online course has been focused on tailoring an educational programme specifically designed for every student who likes to learn a special feature. Our selected teachers are over 10,000 professors of the basics of higher education, creating a knowledge identity system and, above all, a smart learning education platform that has been built and developed autonomously for four years. Our north extranet course is only designed to meet the learning needs of our primary and secondary students. The north extranet course has evolved over the years, with almost four million users enrolled in the north extranet course, covering all provinces and municipalities around the country, including hong kong and australia, and being the leading trend in north extranet education. Future north extranet courses are dedicated to using science and technology to improve learning efficiency, and we are working to break down barriers in the education sector so that our families can enjoy the resources of our high services. The north extranet course customises more series of subjects and open courses for high school students and basic academic institutions, the north extranet course develops basic subjects for all stages of high school, expands the focus of the knowledge framework and the importance of developing special problem-solving techniques, helps students to achieve a high level of depth, adopts basic disciplines with a wide range of knowledge points and more methods, and north extranet talks about a series of educational courses to help a wide range of students find the key to winning in short time and space. In the form of webcasting, which is used in the north extranet course, we begin with a pre-school sign-up, a text message, a large number of announcements about the beginning of the course and opening of the online classroom at the same time, so that students can communicate as soon as they enter the course, with a grouping of people who can speak in writing, and live at the point of view, with the same interaction with the group。