"Blue Planet Chinese" is a Chinese learning platform based on social constructivist learning theory. There are not only high-quality reading text, audio, video and other Chinese learning materials, a large number of exercises carefully designed by experienced teachers, but also an indispensable communication community for Chinese learning. You can communicate and interact with teachers, other learners, and Chinese through text or voice in public forums, and continuously improve your Chinese level in the process of using Chinese; you can also receive teacher guidance in a variety of exercises and assignments. The Blue Planet Chinese platform provides reference to knowledge and ability systems such as the Chinese Proficiency Test (HSK) and the European Common Language Framework (CEFR) and rich learning analysis and management tools, which can help you systematically plan your learning and improve learning efficiency.