usurp the throne
Usurping power, Chinese words, Pinyin is Cu à NW è IDU ó Qu á n, meaning to seize the position and power of the monarch by improper means. It's from San duo Shu.
Idiom explanation
Usurping: seizing, especially seizing the throne.
The origin of Idioms
The fourth fold of Shang Zhongxian's "San duo Shu" in Yuan Dynasty: "that fierce play is very bad. If you get lucky, you have to usurp power."
usurp the throne