I have studied many courses on this platform before. In contrast, I feel that Yishen's platform is very good. He is a platform for professional micro-marketing training. What I learned before is fragmentary, and I can't sort it out. Yishen's course is very systematic and standardized, and the course is very grounded. Teachers are also responsible for one-on-one tutoring. The platform I want to learn from Yishen is a good choice.