usurp the throne
Extraordinary conspiracy is an idiom pronounced f ē ICH á n ɡ zh ī m ó u, which means ordinary conspiracy. A conspiracy to usurp the throne.
source
Ban Gu's biography of empress Xiaocheng Zhao in Han Dynasty: "there must be extraordinary changes in the past, and then there are extraordinary plans."
Examples
The great eunuch is also afraid of righteousness, which is difficult to burst out. (the tombstone of five people by Zhang Pu in Ming Dynasty)
usurp the throne
If you plant a melon, you get a melon - zhòng guā dé guā,zhòng dòu d
the nation is prosperous and the people are strong and powerful - guó fù mín fēng
With its faintness, make people clear - yǐ qí hūn hūn,shǐ rén zhāo zhāo