(1) Short teaching time: Teaching video is the core content of micro-lesson. (2) Less teaching content: "Micro-course" is more suitable for teachers' needs because of its concentrated questions and prominent themes. (3) Small resource capacity: In terms of size, the total capacity of "micro-lesson" videos and supporting auxiliary resources is generally around tens of megabytes. (4) Structure of resources: it is "situational" and easy to use. (5) The theme is prominent and the content is specific. A class is a theme, or a class is a thing. (6) self-study. Learners' autonomous learning course is one-on-one learning. (7) simple and practical manufacture. A variety of ways and equipment production, for the purpose of practicality.