Chen Qun

Chen Qun (died 7 February 237), courtesy name Changwen, was a Chinese politician of the state of Cao Wei during the Three Kingdoms period of China. He initiated the Nine-rank system for civil service nomination in Wei. Following the death of the first Wei emperor Cao Pi, Chen Qun, along with Sima Yi and Cao Zhen, nominated Cao Pi's son, Cao Rui, to be the new emperor. Provided by Wikipedia