Why are there fewer fans of graduate mathematics in Li Yanfang?

The publicity is not enough and the teaching content is not attractive enough.

1, Li Yanfang has a certain popularity in the field of graduate mathematics, but the publicity is not enough, resulting in a small number of fans.

2. Li Yanfang's teaching content is not attractive enough, or her teaching method is not suitable for some students, resulting in a small number of fans.

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