There are East China Normal University, Xiamen University, Southwestern University of Finance and Economics and xidian university. Rain Classroom is jointly developed by Tang Xue Online and Tsinghua University Online Education Office. The purpose is to connect the intelligent terminals of teachers and students, give new experiences to every link before, during and after class, release the energy of teaching and learning to the maximum extent, and promote teaching reform. Rain Classroom is a new intelligent teaching solution jointly launched by Tsinghua University and Tang Xue Online. It is the latest research achievement of the Online Education Research Center of the Ministry of Education, and is committed to providing digital and intelligent information support for all teaching processes quickly and free of charge.