The King of Chu awoke one day to find an unfamiliar sword lying beside him. He called the swordsmith Feng Huzi to give his opinion of it, and tell him its worth.
然而吳王無道，其中的湛盧劍竟「自行而去」，到了楚國。一天楚王醒來，發現身邊多了一把寶劍，十分驚異，就請來當時著名的劍師風鬍子來評劍，問他這把劍值多少錢？