The concubine system in ancient China is a wonder of the world. From the day the matriarchal clan disappeared, this system began to sprout and then flourished, which was unstoppable. From our modern perspective, the Chinese-style "gas collection system" is an extremely cruel and heartless system. Because it brings "class" into the family, people who share the same bed, and fraternity, and forcibly divides the family into the oppressed and the oppressed. This is a mockery of human nature. Institutionally, Ji Xing system is not as good as the "four wives system" in Arab countries. I have to say that this is the black humor behind "Renshu".
China opposed concubinage very early in ancient times. There is a saying in the Book of Changes: "If two daughters live together, their wishes will be changed." We can get the vision and equality of human nature. Better than hedonism and autocracy. Concubine system still exists, and a complete set of rules has been formulated.
It can be said that in any case, as long as it is a concubine, it basically becomes an object and will be taken away by his wife at any time. After the first wife gives birth to a child, the second wife's child is also the first wife's child. My son is a civilian. Civilians cannot surpass their sons. He has a great family business and his own son enjoys the best education. He can only stay with him. Therefore, in ancient times, girls with good families generally did not become concubines. When concubines are slaves or desperate, they can't choose to be concubines.
So we can see that concubinage not only hurts women, but also hurts countless helpless men. Our modern society has lost the concubine system. If there are people who want to be three wives and four concubines and drag themselves to the point where men only have mud, then they can only reinvent the wheel.