Historical records have relevant records: "Zang'er's eldest daughter married the grandson of the King of Jin and gave birth to a daughter. Zang'er made a divination and said that both girls should be noble. Because he wanted to marry the two girls, he took them away. The Jin family was angry and refused to give up. The prince fell in love with her and gave birth to three girls and a boy. Guizheng also. "Emperor Xiaowen died before he was born, Emperor Xiaojing succeeded to the throne, and Mrs. Wang gave birth to a boy."
Translation: Queen Mother Wang first married King Jin's grandson and gave birth to a daughter, Jin Su, who has the same mother as the emperor. Father's sister. Zang'er (the queen mother's mother) was so excited that she asked someone to tell fortunes. Unexpectedly, the fortune telling said that her daughter and granddaughter were both wealthy and powerful. Zang'er began to regret it, so he snatched his daughter back from the Jin family and kept her until the prince was drafted and entered the palace. The Jin family had no choice but to keep Jin Su. This Wang Ao lived up to her expectations. With her beauty, scheming and God's favor, she beheaded countless beauties, and finally made her way to the pillow of Emperor Jing Liu Qi, who was still the prince at the time. Fortunately for Liu Qichong, Miss Wang gave birth to three girls and one boy. The three girls were Princess Pingyang, Princess Nangong, and Princess Linli. The "one boy" was later Liu Che.
It should be the director's idea that Princess Jinsu and Princess Pingyang are played by the same person in "Emperor Wu of Han Dynasty".