Yin Shoumin is a famous teacher in Hefei No.6 Middle School, a master of mathematics education, a member of the Mathematics Professional Society, a backbone teacher in Hefei, a coach of the Mathematical Olympic Competition, and an interviewer for the qualification of primary and secondary school mathematics teachers. He used to be a teacher in the competition class, a head teacher and a teacher in the experimental class, and now he is a mathematics teacher in the experimental class. He has helped many students win the first and second prizes in mathematics competitions, published many papers in CN publications, participated in the national, provincial and municipal paper selection for many times, and one article won the first prize in the province and the third prize in the country.