以假乱真以假亂真

yǐ jiǎ luàn zhēn

ㄧˇ ㄐㄧㄚˇ ㄌㄨㄢˋ ㄓㄣ

Idiom

1(idiom) to pass off the fake as genuine; to blur the line between fake and real so convincingly that the fake is mistaken for the real thing