Introduction to Xuanwu Hall: Since Zhang Sanfeng, the founder of Zhenwu, saw through the mortal world and did not want to be a human emperor, he went out to practice Taoism. He obtained the Yitian Sword and came to the "Shiyan Village" in the deep mountains and old forests. He saw a towering peak in Shiyan Village, surrounded by mountains and rivers, and dense forests. , is a geomantic treasure land, so he built a thatched hut and lived in seclusion in the mountains to practice with concentration. As his skills deepened, he realized the true meaning of "practice in the front mountain and cultivate Taoism in the back mountain".