Ningcheng was a casual cultivator. Although he had the Xuanhuang Pearl, he had no famous teacher to guide him. In his opinion, in order to achieve Xuandan, one must fill up one's own Dan Lake. It's like his Yuan-building realm has risen to the level of Xuan Liquid. Only when Zhen Yuan has fully filled the meridians and Dantian can the prototype of the Dan Lake be formed....