Both their names blended, as xuansu zhidao (玄素之道), signify the Daoist arts of the bedchamber. The Dongxuanzi Fangzhong Shu (洞玄子房中術, "Bedchamber Arts of the Master of the Grotto Mysteries"), which was very likely penned by the 7th-century poet Liu Zongyuan, consists of express descriptions of the sexual arts that was supposedly transmitted from Jiutian Xuannü.