Cloud classroom: online and offline cloud classroom, with videos, lesson plans and experiments designed around professional courses, making teaching easier and learning more convenient. Cloud evaluation: massive question bank evaluation system, competitive ranking, intelligent push (topic), automatic correction, online question and answer system to comprehensively improve your skills. Cloud training: enterprise-level project case base, shared crowdsourcing publishing platform, knowledge points published here, providing a source of wisdom for innovation and entrepreneurship. Cloud live broadcast: break down the barriers of teachers in colleges and universities, and let the front-line engineers of enterprises communicate face to face, teach and answer questions through the Internet platform. Cai Yun Library: Online learning archives, linking classrooms, assessment and video systems, showing individual abilities in multiple dimensions, paving the way for bright employment of college students.