The Hu brothers recalled: "Mr. Yu not only answered all the technical questions, but also sent two fishnets, two sets of rubber clothes and an artificial hatcher.
胡氏兄弟說：「余所長不僅教我們克服養殖鱒魚的種種技術問題，並且送了我們漁網、手托網、橡皮衣、人工孵化器等各種設備。無論飼料的調配、病毒的防治、人工受精時精卵比例的配合… …，余所長都一而再、再而三地教給我們。