投筆從戎（投筆從戎）　

◎ 投筆從戎 tóubǐ-cóngróng

[throw aside the writing brush and join the army;renounce the pen for the sword;give up civilion pursuits for a military career] 中國后漢班超家境窮困,在官府做抄寫工作,曾經(jīng)擲筆長嘆說,大丈夫應當在邊疆為國立功,哪能老在筆硯之間討生活呢!后人把文人從軍叫做投筆從戎