The rules of each dynasty and each generation are different, and the luckiest thing is that the birth mother of the new emperor is crowned empress dowager, and continues to enjoy the glory and wealth in the palace, admired by thousands of people, and witnesses the prosperity of the next dynasty.

Those concubines who are pregnant with heirs, if their children enjoy the treatment of princes and princesses in the dprk, can follow their children to the fiefdom, although it is not as beautiful as when they were pet concubines, but if the children are not involved in rebellion, the second half of their lives are also safe and sound, and they have no worries about food and clothing, which is a relatively good destination.
When the emperor drove the crane to the west, the most feared was probably those concubines who had no heirs! From Qin Shi Huang to the Qing Dynasty, the system of martyrdom has always existed, or a cup of poisonous wine, a foot of white silk, and even some were sacrificed to accompany their husbands.
When Qin Shi Huang died, the second emperor said: "The first emperor and the harem, those who do not have children, it is not appropriate to go out", all of them are ordered to die, and there are many dead ("History of Qin Shi Huang Benji"). According to the records of the "Records of History", Qin Shi Huang "listed more than 10,000 women in the harem, and the anger soared", and the number of people who did not have children was probably also 10,000, which shows how large the number of people who buried Qin Shi Huang was.
There is also a way to guard the spirit for the former emperor, and the concubines who are selected are generally very favored by the emperor before he dies, young and beautiful, and have no heirs. They were lucky compared to the martyrdom, but they could only spend the rest of their lives here, lonely, lonely, lonely, and lonely, watching themselves go from youth to old age until they were buried with the emperor after death. After the death of Emperor Hancheng, Ban Jieyu asked to go to the Tomb of Cheng tomb to guard the spirit for the rest of her life, and Empress Wang arranged for her to serve as the guardian of the cemetery, and from then on, she accompanied the stone people and horses every day, and spent her life coldly.
Some old emperors, before their death, prevented his concubines from being desecrated by the new emperor, and would order that after his death, the concubines should be allowed to enter the temple as nuns, often accompanied by green lanterns, and after Tang Taizong's death, he had Wu Zetian cut his hair as a nun.
Some emperors are more benevolent, after they ascend the throne, they will let all the concubines of the previous emperor move to another palace, let these sisters and sisters accompany them, enjoy their old age, and honor them as concubines and concubines, although they are not as graceful and luxurious as before, but they are also carefree, and it is also a good home.
The most absurd thing is to be included in the harem by the new emperor, which is unethical and seriously incestuous, but it has also been promoted by several dynasties. After the death of Genghis Khan Temujin during the Yuan Dynasty, his successor Wo Kuotai took in the concubines he left behind, and after Emperor Taizong's death, Li Zhi married Wu Zetian and made empress, although not a birth mother, but also against ethics.