In the Tang Dynasty, Li Shimin killed his younger brother Li and his younger brother Li Yuanji and forced Li Yuan to succeed him as emperor. His actions staged the change of Xuanwu Gate. Until later, because of a crime of stealing antiques, an epitaph was found, which was the tomb of Zheng Guanyin, Li's wife in the Tang Dynasty. Archaeologists have learned that Zheng Guanyin was born in a famous family at that time and received a good education and morality since childhood. The change of Xuanwu Gate has also greatly changed her life. After Li's death, she changed her name to Zheng Guanyin and raised five children alone until her death. So why didn't Li's wife be included in the harem after the Xuanwumen change?

It was a feudal society at that time. After Li Shimin came to power, Zheng Guanyin was not forced to be his concubine. They paid more attention to her marriage to avoid being reviled and spared Zheng Guanyin. Li Yuanji's wife, Yang's daughter, is also outstanding in appearance and quite talented, and is accepted as a concubine. In fact, Yang's daughter contributed to the future development because of her identity background, which shows how scheming she is.

For the changes of Xuanwu Gate at that time, what Li Shimin did was revealed by modern people. We can also see that at that time, he completely ignored his family and killed his relatives and Li's youngest son by hook or by crook for his own purposes. Zheng Guanyin witnessed the death of her husband and children. What kind of pain will it be? Zheng Guanyin had a child in her stomach at that time. In Li, Li Shimin was able to let go of other children because there was a traditional idea that men could inherit the throne.

People are still talking about this history. Many people think that Li was also very powerful at that time, and many people think that Li Yuanji's wife married voluntarily. But Zheng Guanyin must have lived in pain all his life. Maybe she didn't dare to remember, so she got up the courage to live to death.