Judging from the course of the war, Li Yu's military strategy is appropriate. It took more than a year for Song Jun to send troops in October of the seventh year of Kaibao and attack Jinling in December of the eighth year of Kaibao. Among them, Song Jun was stationed in Jinling for one year. Although the war situation is unfavorable to Nantang, both sides have their own gains and losses. It was the repeated defeats in these places that hampered Song Jun's strength, led to the protracted siege of Jinling, and even made Zhao Kuangyin waver, intending to retreat and rest.
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.