The Qin Dynasty organized the area as Hanzhong Commandery, with a capital in what is now Nanzheng County, located just south of the modern Hanzhong urban area. After the Qin collapse in 207 BC, Liu Bang, who would later become the founding Emperor Gaozu of Han, was made lord of Hanzhong during the chaotic times of Xiang Yu. The city continued to operate during the next 400 years of often-chaotic politics between the end of the Han and the beginning of the Tang Dynasty, though its name and bureaucratic designation changed often. In 784 AD, Emperor Dezong of Tang fled to Hanzhong amid a rebellion that temporarily seized control of the capital Chang'an (modern Xi'an). Emperor Wanli (reigned 1572 - 1620 AD) set his fifth son Zhu Changhao as a local king of Hanzhong. Changhao built a large, luxurious palace in what is now the Children's Park, and remnants of the palace can be found in the vicinity.