In the eighth year of Zhenguan in the Tang Dynasty (634), Tubo Zanpu Songzangambu sent envoys to the Tang Dynasty, and Emperor Taizong sent a pedestrian Feng Dexia to Tubo. Songzan Gambu once again sent someone to the Tang Dynasty to propose 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.

Tang Zhenguan 12 (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 invade the Tang Dynasty on a large scale without relatives. Niu Jin led the Tang Jun vanguard to defeat the Tubo army, and Songzan Gambu was greatly afraid. Before the arrival of Tang Jun's main force headed by Hou in the Tang Dynasty, he withdrew from Tuyuhun, Tangut and Bai Lanqiang, sent envoys to apologize, and asked for marriage again, and sent a big talk about Xue Ludong's formal dowry with five thousand two hundred gold and the same amount of other treasures. Emperor Taizong made an imperial daughter a princess and married Songzan Gambu.

So there was a love story between Songzan Gambu and Princess Wencheng.

2. Historical influence:

In the Tang Dynasty, the love story between Songzan Gambu and Princess Wencheng has been passed down as a much-told story by later generations. At that time, Princess Wencheng's entry into Tibet not only brought back decades of stable life to the Tang Dynasty, but also brought a large number of advanced production equipment to the Tubo people, which also promoted the spread of Buddhism in the local area. The ingenious Princess Wencheng also taught the local people how to weave and make clothes. Therefore, it has also been respected and loved by Songzan Gambu.