Eastern Jin Dynasty Tao Kan is young when works as the Xunyang county petty official,has supervised the fish dam specially.Once,he had sent for a pot dried fish to give the mother to taste,not only has not expected Tao Mu to make the messenger to return to the dried fish,moreover writes a letter blames him:“you serve as an official,take government authorities' thing to give me,not only cannot bring the advantage to me,actually instead has increased the anxiety for me.Tao Kandu finishes the mother incoming letter,ashamed and penitent occurs simultaneously,feels too ashamed to be in public.Henceforward,Yan Mu lectures inscribes in the heart.After that is the official 40 years,industrious cautious government official duty,constant.