Seventeen-year-old eldest son of the Li family. Despite years of studying, he had failed even the lowest student examination. His parents stopped supporting him and pinned all hopes on his youngest brother Li Ziming. He was described as lazy and eccentric, refusing to work and spending his days locked in his room with books. In the previous life, after drinking spiritual spring water, he surpassed all others in physical and mental abilities, was recognized by the Pingyang Marquisate, achieved three consecutive top-scoring exams, and later legitimately inherited the title. However, Su Yunwan knew he was not a man worth entrusting one's life to.