Geng Zhongming

Geng Zhongming (; 1604–1649) was a Chinese military general who lived through the transition from the Ming (1368–1644) to the Qing (1644–1912) dynasty, during which he served both sides. His grandson Geng Jingzhong was one of the Three Feudatories who rebelled against Qing rule in the 1670s.

Under Ming service Geng Zhongming was described by historians as a tall, dark-complexioned man known for his bravery and resourcefulness. He had first served under the Ming warlord Mao Wenlong near the border of Joseon Korea. When Mao was executed for disobedience by Yuan Chonghuan in 1629, Geng and other military leaders such as Kong Youde refused to serve Yuan. With their troops, they fled by boat from the Liaodong Peninsula to Dengzhou (, which aministrative seat is in today's Penglai, Yantai) in Shandong. In February 1632, Kong and Geng mutinied at Wuqiao, took over Dengzhou, established a rebel regime in the city (Kong was named "king"), and attempted to seize other towns in eastern Shandong, but were eventually driven out by a Ming relief force. In May 1633, they crossed the Bohai Gulf back to Liaodong and surrendered to Hong Taiji (1592–1643), the Jurchen Khan and future emperor of the Qing dynasty.

Under Qing service Like Kong, Geng was allowed to retain control of his own troops (about 6,000). In 1633, he helped the Manchus capture the town of Lüshun, and in 1634, he accompanied a raiding expedition near Datong in Shanxi. In 1636, he was given the title of Prince Huaishun . He also led his troops into battle during the second Qing invasion of Korea. In 1642, his soldiers were incorporated into the Han Plain Yellow Banner.

In April 1644, bandit leader Li Zicheng captured the Ming imperial capital of Beijing and forced the Chongzhen Emperor (r. 1627–1644) to commit suicide. Under the leadership of Prince Regent Dorgon, the Qing pretended to take revenge on Li and attacked China. In late May 1644, Dorgon and his new ally, Ming general Wu Sangui, defeated Li at the Battle of Shanhai Pass and soon took Beijing from rebels. Geng Zhongming was sent to accompany Prince Dodo in pursuit of Li, who had retreated to his former headquarters in Xi'an (Shanxi). After Li's defeat, Geng participated in the Qing conquest of Jiangnan, then fought against the forces of the Southern Ming Prince of Gui (1644–1662), a loyalist movement attempting to restore the fallen Ming dynasty.

The "Dolo efu" (和碩額駙) rank was given to husbands of Qing princesses. Geng Zhongming, a Han bannerman, was awarded the title of Prince Jingnan, and his son Geng Jingmao managed to have both his sons Geng Jingzhong and Geng Zhaozhong (耿昭忠) become court attendants under the Shunzhi Emperor and marry Aisin Gioro women, with Prince Abatai's granddaughter marrying Geng Zhaozhong and Haoge's (a son of Hong Taiji) daughter marrying Geng Jingzhong. A daughter Princess Roujia (和硕柔嘉公主) of the Manchu Aisin Gioro Prince Yolo (岳樂, Prince An) was wedded to Geng Juzhong who was another son of Geng Jingmao.