In order to resist the rule of the ancient dragon king, the demon dragon Cangpo entangled many demon dragons and launched a war with the ancient dragon king. In the end, the demon dragon Cangpo was defeated miserably, leaving only one son on the ancient underworld. The son of the demon dragon fell from the sky and landed in the deserted mountains, smashing a big hole in the ground. The loud noise alerted a nearby monk. The monk Nie Zhiye saw such a strange scene and cared about the pity of the baby, so he adopted the baby and named it Nie Xuan.
