In the south of the Yangtze River, Li Lan's projects to benefit the people, such as dredging the outlet of Liaohuachi, maintaining the old dam of Yanjiazha and restoring Nanfeng and Nanfeng dikes, were praised by Li Shu in the south. Another example is the discussion about the excavation of Zhujiashan River, from which Wu people still benefit. Due to his outstanding achievements, Yong Zhengdi issued a decree declaring Li Lan as "commander of the 10th company and the first minister of defending the land; Jiu Mu is an expert and Fang Yue is an official. "Li Lan loves books and articles all his life. I often send people to buy books in other places, hide them in the garden and recite them every day. His works have been lost for many years. From the existing articles, we can see a prominent feature of Li Lan's style of writing, such as Shi Menglan's Learning to Be Excellent to Be an Official, An Invincible Gentleman, What's Evil Next, and Learning from the Past. The Li family has been an official for generations, and his career is bumpy. Li Lan was disintegrated because he was born. After Yongzheng ascended the throne, Li Lan's official career was difficult until Qianlong ascended the throne, and Lan went to Beijing to accept the shadow seal. At that time, North Korean traitors stood in the way, which led to Li's despair and suicide. His son, Yuan Ye, was dismissed from office because the uprising was postponed and returned to his hometown for ten years. His grandson Photon, "At the end of Jiaqing, the emperor traveled eastward and Photon made a statement", was sent to Xinjiang. In view of the sinister political career of our ancestors and the impermanence of honor and disgrace, Li Lan's descendants rarely thought of being an official, and there were many people who read, write, teach and educate people in rural areas. Later generations praised the Li family's contribution to Laoting's cultural education.