September 10th is Chinas 31st Teachers Day. The academician of Chinese Academy of Sciences and professor of the College of Chemistry of Nankai University, Shen Panwen is regarded as the example among the faculty. This year, Mr. Shen Panwen has marked his 100th birthday. He has been a teacher for seventy-five years, and he is the one who has taught the longest time in the basic disciplines in China. He’s still teaching undergraduates over the age of 90. Yesterday morning, Nankai University held