Friends, stories are just stories. Unofficial history can be changed at will, but history cannot be changed. As Li Shimin, whether he loves Sun Chang Una or Princess Ruyi more, history and story are completely different. In fact, in this TV series, the neglected eldest grandson queen is Li Shimin's favorite, and Yang Fei, the prototype of Princess Ruyi, is just a trophy of Li Shimin. She was still very young when she was captured, but because of her beautiful appearance, she was first arranged to be a maid for the eldest grandson queen, and was possessed by Li Shimin when she grew up. There is no such thing as love.

In the history of Li Shimin, two women were princesses of the Sui Dynasty. One is Yang Fei, and the other is Princess Qi occupied by Li Shimin after he killed his younger brother Li Yuanji, king of Qi.

The prototype of Princess Ruyi is Yang Di's daughter. She married Li Shimin and became Yang Fei. Yang Fei later gave birth to two sons, one is Li Ke, the king of Wu, and the other is Li Cheng, the king of Shu. His son Li Ke is known as "the philosopher of Taizong, and Wu Hetai is the wisest." Li Ke was praised as a "self-class" by the well-known and kind-hearted Emperor Taizong, and was put forward as a candidate for establishing a bank, threatening the interests of specific groups and becoming a victim of political struggle. After Li Shimin's death, Wu was framed by Wuji and sent to the guillotine.