Hong Chengchou
Meanwhile, Wu Sangui's departure from the stronghold of Ningyuan had left all the territory outside the Great Wall under Qing control. Two of Dorgon's most prominent Chinese advisors, Hong Chengchou and Fan Wencheng (范文程), urged the Manchu prince to seize the opportunity of the fall of Beijing to present themselves as avengers of the fallen Ming and to claim the Mandate of Heaven for the Qing. Therefore, when Dorgon received Wu's letter, he was already about to lead an expedition to attack northern China and had no intention to restore the Ming. When Dorgon asked Wu to work for the Qing instead, Wu had little choice but to accept.