Tall man. The mathematics innovation application contest contains high gold content, and the test paper structure of the number creation contest is flexible and diverse. The presentation part of problem-solving skills takes into account the original innovation of outline and test questions. Not everyone can enter the semi-finals, but they need to enter the layers of selection. The number-building contest is open to students from grade three in primary school to grade three in high school. It consists of two parts: the preliminaries and the semi-finals. Those who achieve excellent results will be qualified as campers of the 7th National Youth Mathematics Innovation Camp.