When the concubine of Emperor Jing of the Han Dynasty came to have her period, she arranged for the maids around her to sleep with her, and an idiom was born.
Things about the Song Dynasty: A glimpse into Song people’s views on marriage and love from "Do you know, do you know, they should be green, fat, red and thin"
The only one who accepted the canonization ceremony of the imperial concubine during her lifetime, became a fan after entering the palace, and the queen was buried with her