Yes Teacher Sun Weigang (1938 ~ 2002), 1938 was born in February, Haiyang, Shandong, Han nationality, graduated from university, and was a producer in party member, the Communist Party of China. 1962 Up to now, I am a math teacher and head teacher of Beijing No.22 Middle School. In June 2002, he died at the age of 64 because of ineffective cancer treatment. He has won many honors, such as the national model worker, the national top ten model teacher, and the title of "people's teacher". His book Mathematics in Sun Weigang is still on sale in Tmall until September 16, 2022.