Master Du Xuan, a fictional character in the novel Romance of Gods in the Ming Dynasty, is the only disciple of Laozi (a great master). He is considered to have a high understanding of both internal and external alchemy and has to inherit the magic weapon "Bagua Zijin Furnace".

The exorcist, Du Xuan, was first invented in Romance of the Gods. According to legend, he is the only disciple of Laozi (the Emperor's Father) and is considered to have a high understanding of both internal and external alchemy, so he should inherit the magic weapon "Bagua Zijin Furnace". The exorcist in Du Xuan in Travels to the North, because of his boundless merits, was named as a wonderful music god by the Jade Emperor, with the full name of "Great Hui Jing Temple Music God", and the Han people also called him "Lingguan Emperor". Now it is one of the righteous gods enshrined by Zhengyi. There is a collection of "Da Hui Jing Ci Miao Le Tian Zun says Fu De Wu Jing" in the Taoist classic "Orthodox Taoist Collection ● Zhengbu", which is a righteous god respected in the later period of Taoism.