Sim writes that in 1933 he worked as a teacher after the founding of the Seng Cheong Night School, and from World War II he took on administrative duties, watching class after class spread their wings and fly-after 60 years in education, even his students 'students have retired, so Sim has become a virtual great-grandfather of teachers.
沈慕羽為文表示，1933 年晨鐘夜學開辦時他就擔任教職，二次大戰後開始掌理校政，眼看一批批學子畢業離去，60 年來，連學生的學生都已經退休，自己可稱之為曾祖級老師了。