Ancient emperors paid attention to their children, which was simply considered as a national event. After all, if they have no children, they can only let their younger brother or their son inherit the throne. No one wants to pass on his throne to outsiders. If they have a son, they'd better pass it on to their own son. Therefore, when the emperor did not ascend to the throne, whether he had children may also be a very important criterion for whether he can be an emperor.
Emperor Amin, on the other hand, seems to prefer boys to girls and has no cold for women. Although there were thousands of beautiful concubines in the harem, Amin never went to those concubines' bedrooms, which led to Amin's marriage for more than ten years, but he did not give birth to a son and a half. This makes Amin's mother very anxious, because if there is no son, if Amin suddenly dies one day, the throne will be given to his younger brother, and all previous efforts will be in vain.
So I chose a group of concubines from Amin's harem to train them, let them wear men's clothes every day, and then learn from men in their behavior. After several months of training, these concubines are no different from men in appearance, but beards were popular among Arab men at that time, which made this woman more like a man, and Amin seemed to be very interested, and gave birth to several sons in less than a year.