Wang Xuanfu

Wang Xuanfu, also known as Wang Cheng, is a legendary Taoist of the Han Dynasty, who became immortal at the age of 256, under the name of "Lord of the Young Yang of the Purple Office". He is sometimes equated with the god Donghua, in which case he is made a character of the Zhou dynasty. Considered the master of Zhongli Quan to whom he would have transmitted alchemical secrets and the technique of the sword of the black dragon, he is one of the Five Ancestors of the North of the Quanzhen current and was titled by the Yuan emperors.
He is said to be from Donghai, now Yanzhou in Shandong. As a disciple of the immortal of the White Clouds, he was said to have been a hermit in the magical caves of the Kunlun, Wutai and Zhongnan mountains, the latter frequented by the apparitions of Wang Chongyang, founder of Quanzhen. He is sometimes depicted as a wandering vindicator carrying a pair of flying swords on his back that can accomplish their mission on their own and then return to their scabbard. His divine birthdays on 15 of the 6th month and 16 of the 10th month.