: 1, how to find out the way to balance those client buy the courses and clients get the free courses. 2, how to start this business more quickly and efficiently? 3 think about some other problem I may encounter when I run this business.
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: 1, how to find out the way to balance those client buy the courses and clients get the free courses. 2, how to start this business more quickly and efficiently? 3 think about some other problem I may encounter when I run this business.