大開眼界 (daai6 hoi1 ngaan5 gaai3) — real eye-opener; eye-opening in Cantonese
daaiˍ₆大hoiˉ¹開ngaanˏ₅眼gaai˗₃界简 大开眼界
Mandarin Pinyin: da4 kai1 yan3 jie4
Meaning of 大開眼界
nounreal eye-opener; eye-opening
nounmaking someone to open his/ her eyes and learn/ understand the previously unknown