Nuwa patched up the sky and left behind four spiritual stones. Each of the four kingdoms in the southeast, northwest and northwest had one to compete with each other so that the people could live in peace and the world would be peaceful. Later, the Southern Kingdom perished. In order to rely on the power of Nuwa's spiritual stone, the Southern Kingdom's princess Ye Shengge created a new space, the "Illusion of Vacant", to allow the people of the Southern Kingdom to live and regain the Southern Kingdom.