Looking for a book that traveled to the Tang Dynasty, the protagonist became the second son of Du Xiang.

Princess Chengyang, the sixteenth daughter of Emperor Taizong, is the eldest grandson of his mother.

During the Zhenguan period, Emperor Taizong personally chose a husband for his daughter, namely Du He, the second son of Du Ruhui, Duke of Lai. Du Ruhui is the 24th hero of Lingyange, ranking third. Du He was named Xiangyang Gong because he married Chengyang. Unfortunately, Du He failed to cherish this special honor.

In the seventeenth year of Zhenguan, Prince Li Chenggan wanted to rebel. Du He said to Li Chenggan, "Yan Liren of Langya knows the number of stars and thinks it's time to build a great cause. If you do, you can respect your majesty as the emperor's father As long as you pretend to be ill, your majesty will come to see you in person, so that you can take the opportunity to succeed. " As a result, the rebellion was exposed and Du He went to prison to die. Before the execution, Du He had a mysterious image without fear.

Although Du He is the son of a civil servant, he has such courage and courage, which makes people regret and admire at the same time. However, due to Du He's carelessness, Chengyang was married for less than a few years, so he kept his new widow. However, Emperor Taizong also felt sorry for his daughter, so he chose Xue Kui, the son of Xue Huaiyu, who was born in the Xue family in Hedong, as his husband. In order to let his daughter have no regrets in this marriage, Emperor Taizong made a divination specially, and the divination showed: "Two fires eat together, and at first they are prosperous, and at last they are the same plant. If you hold the ceremony day and night, you will be lucky in the end. "

According to the practice at that time, the wedding should be held at night, but according to the result of divination, the wedding needs to be held during the day to be auspicious. So Emperor Taizong decided to change Chengyang's wedding to daytime, but this move was strongly stopped by Ma Zhou, so Emperor Taizong had to give up. However, it is gratifying that the marriage between Chengyang and Xue Kui has not been affected, and the relationship between husband and wife is very harmonious after marriage.

After Tang Gaozong acceded to the throne, Li Zhi was also very fond of his twin sister, so the history books specifically recorded "deep friendship".

In the second year of Longshuo, Princess Chengyang was seriously ill, and Li Zhi ordered a large pharmacy to treat and take good care of the princess. Later, Chengyang heard that Zen master Farang of Qingliu Temple could cure him of his illness, so he asked him to set up an altar to recite scriptures, and he really recovered quickly. After his recovery, Chengyang not only gave Jackson Farang a large reward, but also asked his brother to change the Qinglong Temple into Kannonji. Li Zhi saw her sister was seriously ill, so she naturally agreed.

At the beginning of Lin Dechu, Xue was the general of Zuo Feng, and was later demoted to the secretariat because of the witchcraft incident of Princess Chengyang. Although Chengyang was not punished for his brother's partiality, he left Beijing with her husband out of love. Later, Emperor Gaozong chose Princess Chengyang's son Xue Shao to marry his daughter Princess Taiping.

On May 16th, the second year of Xianheng, Princess Chengyang died. Grief, Li Zhi sent envoys and imperial secretary to Zhou Fang to attend his funeral. After Chengyang couple's coffin returned to Beijing, Li Zhi mourned at the county gate, weeping bitterly, and was ignored for five consecutive days. The sons of Princess Chengyang, Xue E and Xue Shao, also returned to Beijing with their parents' coffins. Li Zhi remembered his sister, so he named Xue E as the Hou of Hedong County and appointed him as the secretariat of Jeju. He also married Princess Taiping, the apple of his eye, to Chengyang's youngest son, Xue Shao. Although there was a national story in the Tang Dynasty, Li Zhi only chose the son of Princess Chengyang to marry his favorite daughter, largely because of the deep brotherhood between Li Zhi and Chengyang.