寶ㄅㄠˇ刀ㄉㄠ不ㄅㄨˋ老ㄌㄠˇbǎodāo‑bùlǎo

简宝刀不老

  1. 比喻年紀雖老，但功夫、技藝仍然精湛，不減當年。例 「籃球場上他年紀最大，但寶刀不老，仍帶領球隊奪得了勝利」。

英lit. a good sword always remains sharp (idiom)​, fig. (of one's skills etc)​ to be as good as ever, the old man still has it