Is it necessary to continue if the preliminaries of the math high school league are not shortlisted?
Need. According to the official website of the National High School Mathematics Federation, the corresponding preliminary contest is also a part of this activity. If you don't enter the preliminary round, you can't enter the semi-finals. This is the rule of the game, you can continue to work hard in other fields. Success is not only a way of competition, but also the preliminary contest of math high school league is not shortlisted and needs to be continued.