马后炮
mǎhòupào
moving the cannon after moving the horse away, a useless action or comment
HSK 79
Traditional馬後炮
Additional Dictionary Meanings
(Chinese chess) moving the cannon after moving the horse away(fig.) a useless action or comment; sth done after it's too latevariant of 馬後炮|马后炮[ma3 hou4 pao4]