Defense. On September1May-20, 2020, the judging meeting of Shandong Division of 2020 "Higher Education Club Cup" was held in Qilu University of Technology (Shandong Academy of Sciences). Mathematical modeling Shandong Division results release: On September 5, 2020, Shandong Division conducted a network technical defense for the teams entering the national competition. Mathematical modeling is a process of analyzing and simplifying problems from practical problems, establishing corresponding mathematical models by refining or making appropriate assumptions, and solving the models according to existing mathematical knowledge (including calculation software or programming).