Yang Guifei of the State of Qi Yang Guifei of the State of Qi was a young lady of a noble family in the Sui Dynasty. When she was young, she married Li Shimin's younger brother Li Yuanji. After Li Yuanji's death, Yang, Princess of the State of Na Qi in Li Shimin, became a concubine. Although she was never awarded a formal title, she was the only concubine who gave birth to a child after the death of Li Shimin's eldest son.
Therefore, I like Yang very much, and I am of Xianbei descent. In Xianbei, after the death of a father or brother, their wives can be inherited by other men in the family. The folk customs in the Tang Dynasty were also very open, so it didn't take much psychological burden to marry Princess Yang of the State of Qi.
For political reasons, Li Shimin wants to marry Yang, Princess of Qi. Princess Qinyang is the granddaughter of the King of Sui Dynasty. Yang Guifei's family background is very prominent. From the Southern and Northern Dynasties to the Sui and Tang Dynasties, it has always been an aristocratic family in the north and has great influence in society. At the same time, most of the Yang brothers are officials in the imperial court, which is a very powerful force.
At that time, he had just ascended the throne, and there were many voices against him in the DPRK. He urgently needed to win over the forces of various aristocratic families, and Yang was one of them. Incorporating Yang, Princess of Qi State, into the harem and becoming his concubine meant that he offered Yang an olive branch. He used this move to tell Yang that he hoped Yang would stick to himself, not make mistakes, and ensure that the Yang family would prosper from generation to generation.
In addition to the above two reasons, many friends think that marrying Princess Qiyang is out of revenge. He killed his brother Li Chengjian and his brother Li Yuanji in the Xuanwumen Rebellion, which proved that he hated them very much. Therefore, after Li Yuanji's death, turning Li Yuanji's wife into his own concubine can also satisfy his desire for revenge.