Youcheng is a courtesy name associated with Li Xin, an important Chinese military general who served during the Warring States era. While it serves as a personal designation for a historical figure rather than a geographical location, the name is linked to the military history of the Qin dynasty.
Li Xin was a prominent commander under Qin Shi Huang, contributing to the conquest of the six Warring States alongside other notable generals such as Wang Jian and Wang Ben. He is also recognized in Chinese genealogy as the great-great-grandfather of Li Guang, a general from the Han dynasty.