Yes National Education Cloud is an official online course platform developed by the national education authorities. According to the inquiry of official website, Education Bureau, this platform is legal (formal), with complete qualifications and legal protection, so you can rest assured to consult. National Education Cloud is a free online learning platform provided by the state, which provides all courses from primary school to high school. It has accumulated nearly ten years of courses and a large number of learning materials, and its gold content is very high.