Throughout the middle school stage, there is almost only one mathematics competition that is truly valuable and significant, and that is the national league. Junior high school stage, the full name is the national junior high school mathematics joint competition. Both the Junior League and the Senior League were held by chinese mathematical society for more than 30 years. They have a very standard Italian competition outline, the widest participation, and the most recognized college entrance examination enrollment. It can be seen that junior high school league is very suitable as an introduction to mathematics competition, which not only supplements the knowledge in the classroom, but also strengthens the mathematical thinking and ability, and the awards are very valuable.

Mathematical competition is one of the effective means to discover mathematical talents. Mathematics competition in the modern sense began in Hungary. Most of the winners of some major mathematics competitions have made great achievements in their later careers.