After Ming general
吴三桂 opened Shanhai Pass (
山海关) in 1644, Dorgon led the Qing army south, took Beijing from the peasant rebel Li Zicheng, and installed his six-year-old nephew as the
顺治 Shunzhi Emperor. He held the title
皇父摄政王 ('Imperial Father Regent'). Posthumously stripped of his titles after his death, then rehabilitated by the
乾隆 Qianlong Emperor.