崇祯十七年(1644年)正月十九日,一次影响了整个中国历史走向的长达整整两个月之久的集体决策在北京紫禁城里拉开了帷幕。决策背景:18天前,正月初一,闯王李自成在西安建国,国号大顺;11天前,正月初八,李自成统大顺军主力由西安出发,开始了向北京的最后进军;而此时,北方的明军已经被李自成基 On the 19th of the first month of Chongzhen in 1644 (1644), a collective decision of up to two months that affected the whole course of Chinese history came to a close in Beijing's Forbidden City. Decision-making background: 18 days ago, on the first day of the first lunar month, Chuang Wang Li Zicheng founded the country in Xi'an, and his nationality was Dashun. Eleven days ago, on the eighth day of the first lunar month, Li Zizhi formed his own main military force from Xi'an and started his final march toward Beijing. At this point, the Ming army in the north has been formed by Li Zi-cheng