老于是谁?于永正老师是也。老于,毕生从事小学语文教学。他既能上课,又善总结;著作等身,硕果累累。虽年届古稀,满头银丝,然,研究兴致依旧不减当年。他为人耿直,心口如一,假使骨鲠在喉,必一吐为快。 Who is the oldest? Yu Yongzheng teacher is also. Old, spent his life in primary school Chinese teaching. He can attend classes and make good summaries; Although the seventy years of age, full of silver, however, the research interest is still diminished then. He is upright man, heart like, if the bones in the throat, will soon spit.