Legal basis: Opinions on Further Reducing Students' Homework Burden and Off-campus Training Burden in Compulsory Education, 8 pages. Advocate free online learning. Build a smart education cloud platform to provide application services such as enrollment, policy consultation and information inquiry for students, teachers, parents and citizens. Coordinate online educational resources such as digital schools, build public service platforms and online learning platforms for educational resources, provide high-quality online educational resources and services such as live broadcasts from famous schools and online questions and answers from famous teachers free of charge, and simultaneously create intelligent engine tools for online learning and application services for a group of students such as learning diagnosis, teaching and learning evaluation, adaptive learning and comprehensive quality digital archives, so as to promote public welfare high-quality digital educational resources and high-quality online learning three-dimensional environment to benefit students, parents and teachers around the world.