have never even heard of it
Unheard of, the Chinese idiom, Pinyin is w é NSU ǒ B ù w é n, which means to hear something that has never been heard before, describing things very rare. It comes from the biography of Li Sheng and Lu Jia in historical records.
Idiom explanation
Hear what you've never heard before. It's very rare to describe things.
The origin of Idioms
The biography of Li Sheng and Lu Jia in historical records: "there is no sufficient language in Yue Zhong. I have never heard of it since I was born."
have never even heard of it
in western dress and leather shoes - xī zhuāng gé lǚ
My mouth is boiling and my eyes are red - kǒu fèi mù chì
Square collar and round crown - fāng lǐng yuán guàn