Li Shimin people are most familiar with Yang Fei, the daughter of Emperor Yang Di, whose biological mother is not recorded in detail. This Yang Fei gave birth to Li Ke, the king of Wu, and Li Cheng, the king of Shu. According to the court system in the early Tang Dynasty, there were four concubines in the emperor's harem, namely the imperial concubine Shu Xian. It is said that Yang Fei is Shu Fei, also known as the Great Yang Fei.
After Li Chenggan's rebellion was demoted to Shu Ren, Li Shimin wanted to make Li Ke, the son of Feiyang, a prince, but was opposed by Sun Chang Wuji and other ministers, so he had to give up. However, there are not many records about Yang Fei in history, and more of them appear in film and television literature.
The second Yang Fei is Yang Guifei, who gave birth to Li Fu. There are few official records about Yang Guifei, but we only know it through the text introduction on Wang Zhao Li Fu's tombstone. Later generations speculated that the title of imperial concubine might be a posthumous seal, but there was no evidence to prove it, just speculation.
The last Yang Fei in Li Shimin was Yang Fei, the daughter of the imperial clan of the Sui Dynasty, the princess of the nest and the sister of Dafeiyang, also known as Tiaoyang. Her name is Yang, the concubine of Li Yuanji, the king of Qi, and she gave birth to Li Ming. According to historical records, only the first room of the prince is called the princess, and the other concubines are not wives, which is equivalent to the property of the main family. In ancient times, the official residence was different, and the main hall and the concubine room could never be compared.
Li Shimin's youngest son, Li Ming, was later adopted and passed the incense to Li Yuanji. As far as identity is concerned, he did not take part in seizing the crown prince's power, and even in name, he is not the son of Li Shimin.
Fortunately or unfortunately, these women were involved in the court. In ancient times, it was expensive for mothers and children to be together. For those who can't decide their own destiny, they can only expect their son to succeed. Throughout history, they are only the product of historical development, and there is not much freedom to speak of.