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Is it true that 365 college public welfare olympiad is free?
It's true that the audition is free.

However, you get what you pay for. Although there is no tuition fee for this public welfare course, the teaching materials and school tools need to be purchased by themselves, and the follow-up counseling and follow-up learning also need to be implemented by themselves.

Although it is claimed that it is completely free to hold a public welfare class every day to explain an Olympic math problem, there is no invisible consumption, but this is not the case.