(from Zizhi Tongjian) (idiom) to commit a grave and irreversible error; to make a gross blunder

Song dynasty official and famous poet (1126–1193), known as one of the Four Masters of Southern Song poetry alongside [[陆游|陸游|lu4 you2]], [[杨万里|楊萬里|yang2 wan4 li3]], and [[尤袤|尤袤|you2 mao4]]

(literary) to lead to a catastrophe; to breed disaster