Before Zhao's sisters entered the palace, the children born to Emperor Han Cheng and Queen Xu, as well as the children born to Ban Jieyu, died one after another, so that Emperor Han Cheng at that time did not have a son and a half. On one occasion, Emperor Wu of the Han Dynasty went to the Princess House to play, and Princess Yang invited him to sing and dance. Zhao Yanfei charmed Han Chengdi with palm dance. After that, Zhao Yanfei entered the palace to please Emperor Han Chengdi day and night. Later, Zhao Yanfei recommended his sister Zhao Hede to Emperor Han Chengdi. Zhao was loved by Emperor Han Chengdi because of her light and beautiful body, while Zhao's sister Zhao Hede was plump and more feminine and charming than Zhao. Since then, the Zhao sisters have been favored by the harem. With the Zhao sisters, Emperor Han stopped loving Queen Xu and Ban Jieyu. Let alone other concubines, they can't even see the face of Emperor Han Chengdi, let alone get pregnant.
However, the Zhao sisters have been favored for many years and have never been pregnant, because it is difficult for the two sisters to get pregnant again after taking Xiji pills all the year round. Because Emperor Xian of Han had no son, Ding Liuxin, the nephew of Emperor Xian of Han, wanted to inherit the throne of the Prince, so he deliberately wooed Zhao. Zhao thought, I'm afraid I can't have children in my life, and so is my sister Zhao Hede. If the children born to other concubines become princes, the two sisters Scott will have no place in the harem. With Zhao's help, Han Chengdi, who had no children, could only establish Prince Wei Liu.
During this period, all the concubines in the harem who were favored and pregnant by Emperor Gaozu were killed by Zhao's plot. It is said that a woman named Xu was lucky enough to give birth to her child, but she was also murdered by Zhao. So after the death of Emperor Han Cheng, Liu Xin acceded to the throne, called? Han Aidi? .