This is a place. According to relevant historical records, Epang Palace, also known as Acheng, is often a place to station troops because it is close to Chang 'an. "Fu Jian Jianyuan twenty years (384), Mu Rongchong according to Acheng. The folk song begins with' Phoenix, Phoenix, go to Afangshan'. It is determined that the phoenix is not a phoenix tree that is not born, nor a phoenix tree that does not eat bamboo. Instead, it plants thousands of phoenix trees in Acheng and waits for the arrival of the phoenix (Spring and Autumn Sixteen Countries).