When Japanese imperialism launched the war of aggression against China, Sue was still in primary school. His teacher, Mr. Hong Minchu, is a patriot and often encourages students to study hard and save the country with science. Sue lived up to the teacher's expectations. He studies hard and his grades in every subject are among the best in his class. It was under the guidance of Mr. Hong Minchu that Su's mathematical genius was gradually brought into play.
Mr. Hong is in charge of teaching mathematics. Slowly, he found that Sue was particularly interested in mathematics and listened carefully. Therefore, when he assigned homework to his students, he consciously left him more, but Sue could finish it smoothly every time.
On one occasion, Mr. Hong gave a geometry problem to let students prove the theorem that "the sum of the internal angles of a triangle is equal to 180 degrees". The other students in the class are still thinking in distress. Sue wrote the answer for me. And he extrapolated, using more than 20 methods! After reading it, Mr. Hong thinks that Sue has a genius in mathematics.
In order to cultivate Sue's interest in mathematics, Mr. Hong encouraged him to write a paper on these proof methods and send it to the Zhejiang middle school students' homework exhibition, which caused a sensation.