Dourgen's place is Jianzhou Jurchen, which is far from Mongolian grassland. 1644, the Qing army led by Wu Sangui and Dourgen of the Ming Dynasty successfully invaded Shanhaiguan and defeated the peasant rebels in Li Zicheng, thus capturing the capital. Fu Lin, the emperor shunzhi, became the first emperor in the Qing Dynasty.
What is the reason for the rumor that they are having an affair?
It turned out that when Huang Taiji was alive, Dourgen was seriously ill once. Manchu is much more open than Han, and many things are not so taboo. So Huang Taiji sent his own woman, Bumu Butai, to take care of Dourgen. In the long run, it may be in this process that they give birth to ambiguity. This can only be regarded as speculation, because there is no written record of their ambiguous behavior in the official history.
Dourgen didn't call himself emperor, not because he loved Bumbutai as he did in the play, but because the environment at that time didn't allow it. Haug, the eldest son of Huang taiji, is Dourgen's biggest resistance. However, from Huang Taiji's many sons, it can be seen that Dourgen still has feelings for Bumubutai by choosing only the son of Bumubutai as the new emperor.
But this is people's guess after all. There is no real hammer in history to prove that their relationship is unusual. In addition, not long after the Qing Dynasty entered the customs, Chinese characters were not popularized, and there were no special historians to record these things. Even if Dourgen really admired Bumu Butai for many years, because no one recorded it, naturally there would be no chance to pass it down.