never seen in past history
As a Chinese idiom, the Pinyin is Ku à NGG à w è iy à u, which means extremely rare. It comes from the biography of Wang Zhen in the book of the Northern Qi Dynasty.
The origin of Idioms
In the biography of Wang Zhen in the book of the Northern Qi Dynasty, it is said that "those who risked their lives to serve saw the slaughter, which has never happened in ancient times."
Idiom usage
I was deeply gracious by his highness, but I couldn't make up for it. (Chapter 88 of Xia Jingqu's the wild old man's Expositions in Qing Dynasty)
never seen in past history
Three commandments for gentlemen - jūn zǐ sān jiè
alienate one person from another - tiǎo bō lí jiàn
be as far removed as heaven from earth - pàn ruò yún ní
be frustrated for all one 's talent - huái cái bū yù
young men and women in holiday dress - hóng nán lǜ nǚ