Is Li Yu a descendant of Li Shimin? Is there any evidence?

No, Li Yu's grandfather Li Bian, formerly known as "Xu Zhimo", is the adopted son of Xu Wen, the minister of the Southern Wu Dynasty. Li Bian's life story is recorded in He's A Brief History of wuyue and Tongzhi's Annals of Anji County in Qing Dynasty. He was the adopted son of Xu Wen, the general of the State of Wu, and later changed his surname to Xu, and changed his surname to Li after he acceded to the throne. In Mr. Xia's Chronicle of Poets in Tang and Song Dynasties, he also quoted the record of wuyue's History: "Zhikao Ben Pan Shi was born in Anji, Huzhou. His father was general Anji (the official in charge of money and tax), Wu took Li Shenfu to attack the Yijin army and crossed Huzhou, and Lu listed it as a servant. Xu Wen tasted the blessing of God, sincerely loved it, and sought to be a fake child.

Li Yu (937-978), the sixth son of Li Jing, the ruler of the Southern Tang Dynasty, was originally named Jia Cong, whose name was Chongguang, and whose name was Zhong Yin and Lian Feng lay. Born in Pengcheng (now tongshan district, Xuzhou, Jiangsu), he was the last monarch in the Southern Tang Dynasty.

In the second year of Jianlong in the Northern Song Dynasty (96 1), Li Yu succeeded to the throne, respected the orthodoxy of the Song Dynasty, and paid tribute at the age of 20 to protect peace. In October of the fourth year of Kaibao (97 1), Song Taizu destroyed the Southern Han Dynasty, and Li Yu changed his name to "Jiangnan Master" except the Tang Dynasty. The following year, he derogated from the ritual system and removed the kiss from the rostrum in Jinling (now Nanjing) to show his respect for Song Ting. In the eighth year of Kaibao (975), when he attacked Jinling, Li Yu was forced to land in the Song Dynasty and was captured in Bianjing (now Kaifeng). He was named General Wei and disobeyed orders. On July 7th, the third year of Taiping and Xingguo (978), Li Yu died in Bianjing, known in history as Li Houzhu, Queen of Southern Tang Dynasty.

Li Yu is proficient in calligraphy, painting, melody and poetry, especially in ci. Li Yu's ci has inherited the tradition of Huajian poets such as Wen and Wei Zhuang since the late Tang Dynasty, and has been influenced by Li Jing and Feng Yansi. Its language is bright, vivid, sincere and distinctive. After the national subjugation, his ci was characterized by a wide range of themes and profound meanings, and it was unique among the five pronouns in the late Tang Dynasty, which had a far-reaching influence on the later ci circles.