After graduating from the Chinese  Culture  University, Zeng taught at the National Taitung  University, on subjects of Watercolor , Sketch, Introduction to Fine Arts, and Teaching Methods  and Materials of Arts. Tzeng  stresses the sketch  ability  within  students, as he never  forgot  what his teacher  Mei-Shu Li once said: "Basics is everything to learning paintings, and sketch and theory are the basic fundamentals to paintings."