In the eighth year of Zhenguan in the Tang Dynasty (634), Songzan Gambu sent envoys to the Tang Dynasty, and Emperor Taizong sent pedestrians Feng Dexia to Tibet. Songzan Gambu learned that both Turks and Tuguhun had married the princess of the Tang Dynasty, so he sent people to the Tang Dynasty again and proposed to marry the princess of the Tang Dynasty, which was rejected by Emperor Taizong.
King Tuyuhun entered the Tang Dynasty, and the Tibetan envoy told Songzan Gambu when he came back, claiming that the Tang Dynasty refused to get engaged because King Tuyuhun was in the way. In 638, Songzan Gambu used Tuguhun as an excuse to get in the way, sent troops to defeat Tuguhun, Tangut and Bai Lanqiang, and pushed Songzhou (now Songpan, Sichuan) in the Tang Dynasty, threatening to lead a large-scale invasion of the Tang Dynasty if he didn't kiss.
Niu Jin led the Tang Jun vanguard to defeat the Tubo army, and Songzan Gambu was afraid. Before the arrival of Tang Jun's main force, Songzan Gambu withdrew from Tuyuhun, Tangut and Blanchard, sent a letter of apology and invited her to get married again. He boasted that Xue Ludong had brought 5,200 gold and the same amount of other treasures as a formal betrothal gift.
On the 15th day of the first month in the 15th year of Zhenguan (64 1), Emperor Taizong named Li Princess Wencheng, married Princess Wencheng, praised her and ordered Wang Daozong of Jiangxia to hold a memorial ceremony. Although Princess Wencheng and Princess Jincheng are imperial daughters, not the emperor's own daughters, they have a high status in Tubo. The Tibetan Mkas-pavi-dgav-ston records the celebration of Songtsan Gambu's accession to the throne, crowning Princess Wencheng and making her queen.
Extended data
Li Shimin ascended the throne of the emperor.
On the fourth day of June in the ninth year of Wude (July 2, 626), Li Shimin launched the "Xuanwumen Rebellion", killing his eldest brother, Prince Li, and his fourth brother, King Li Yuanji of Qi, and his son, and was made a prince. Soon, Tang Gaozu Tang Gaozu abdicated, Li Shimin acceded to the throne, and changed his chastity.
During Li Shimin's reign, he actively listened to the opinions of ministers, ruled the country with courtesy at home, was modest and courteous, practiced economy, advised farmers and mulberry workers, and enabled the people to recuperate, enrich the country and strengthen the people, thus creating a famous chastity rule in the history of China.
Open up the territory to the outside world, attack and destroy the East Turkistan and Xueyantuo, conquer Gaochang, Qiuci and Tuguhun, hit Goguryeo hard, and set up four towns in Anxi, where all ethnic groups lived in harmony, and were honored as "Tiankhan" by people of all ethnic groups, laying an important foundation for the prosperous years of Tang Dynasty 100 years.
On May 3rd, the 23rd year of Zhenguan (10, July 649), Li Shimin died of illness in Hanfengtang, at the age of 52, and he reigned for 23 years. His temple name is Taizong and he was buried in Zhaoling. Li Shimin loves literature and calligraphy, and has poems handed down from generation to generation by Mo Bao.
Baidu Encyclopedia-Li Shimin
Baidu Encyclopedia-Princess Wencheng