Is there really a person named "Li Zhong" in history?

This should be the inscription on the cloud room of Zhougong Temple. Li Zhong is a surname, and Li Zhong's middle finger engraved on Fang Yun refers to Zhong Liquan. However, this stone carving was carved by Jin people by imitating calligraphy (see Huang Sui and Tang Stone Carvings and Bi Yuan's Guanzhong Stone Carvings for details). The original stone was first placed between the cliffs of Zhougong Temple, and then copied by people in the city. The original stone was chiseled and moved to the county government building. During Jiaqing period of Qing Dynasty, the city ordered Duan Xiangting to move to practice martial arts. Therefore, the word "cloud room" recorded in Guangxu's "Qishan County Records" is actually an imitation, not the original stone. Now, people living in Zhougong Temple are all imitated by people in Beiguo Village according to this imitation stone.