hitherto unknown
As an unprecedented Chinese idiom, Pinyin is Qi á NSU ǒ w è iy ǒ u, meaning never before. It's from the book of quescan.
The origin of Idioms
Xu Du of the Song Dynasty wrote in the volume of quesao Bian: "it's unprecedented that xunwuzhen, the Privy Secretary of Deng, protected the court with a small number of people instead of holding the Tomahawk at the same time."
Idiom usage
It's more formal than ever. The establishment of the socialist system is a great change in Chinese history. Chapter 79 of the chronicles of the states of the Eastern Zhou Dynasty: "the name of the dance music is Kangle. Its sound and appearance are all new, and its preparation is extremely beautiful, unprecedented." The 83rd chapter of Li Ruzhen's Jing Hua Yuan in Qing Dynasty: "it's really a feast to make such a good order. My younger sister is so flattering that she won't make it clear." Ouyang Xiu, Song Dynasty, wrote "a new long bridge in Songjiang, a magnificent system, unprecedented in previous life." In Qing Dynasty, Wang Shizhen's "notes on ancient poems · general rules · seven character poems": "(Du Fu's" seven character poem "is unprecedented, and it can't be reached later."
hitherto unknown
pretending to be what one is not - rén mú gǒu yàng
find amusement when the occasion arises - féng chǎng zuò xì
exemplary conduct and nobility of character - yīng fēng liàng jié