Introduction to Huayang City: Huayang City is a fortress built in the Han Dynasty. During the Jin Dynasty, the royal city of Dangchang Kingdom established by "Bao" Liang Qin, a member of the Western Qiang people, was once located here. According to local legends Records say that this was once a daughter's kingdom, and the king was called Empress Hulian. There are also related records in the relevant historical materials of Dangchang Kingdom in "Book of Zhou·Shi Ning Biography".