Yanamino有眼无珠
yǒu yǎn wú zhūyouyanwuzhu
- (idiom) blind as a bat (figuratively)
- unaware of who (or what) one is dealing with
- to fail to recognize what sb a bit more perceptive would
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences