hé bì
there is no need
why should
zǎo zhī jīn rì hè bì dāng chū
if I (you, she, he...) had known it would come to this, I (you, she, he...) would not have acted thus (idiom)
to regret vainly one's past behaviour
yǒu bǎo hé bì rén qián kuā
There is no need to boast about one's treasures. (idiom)
shā jī hé bì yào yòng niú dāo ne
don't use a sledgehammer to crack a nut
de minimis non curat praetor (trivial matters are of no concern to a high official)
jì yǒu jīn rì hé bì dāng chū
see 早知今日何必當初|早知今日何必当初[zao3 zhi1 jin1 ri4 he2 bi4 dang1 chu1]
zǎo zhī jīn rì hé bì dāng chū
if I (you, she, he...) had known it would come to this, I (you, she, he...) would not have acted thus (idiom)
to regret vainly one's past behavior