Yuntai Tower, also called Suan mountain and Shutu Mountain is a famous mountain with 2000-year history and culture. It became famous much earlier than Jin Mountain and Jiao Mountain. "Twenty-four History", geography record in Sui Dynasty listed Li Mountain, Huang Hu Mountain and Suan Mountain as famous mountains in Runzhou. Lu Guimeng, a poet in Tang Dynasty wrote a famous poem named “Suan Shan”. Thus in the Three Kingdoms period, Yuntain Mountain located in vital place served as a famous military mountain.