I've Cultivated the Dao for a Century and Become Invincible. You Say I'm Mentally Ill?

Xu Haojie was knocked unconscious by a beautiful woman and remained mentally impaired for three years. What nobody knew was that his soul had transmigrated to ancient times, where he became Xuan Qingzi of the Yunhai Daoist Temple. Three years later, the soul that had cultivated the Dao for a hundred years returned, and he used his Daoist inheritance to dominate the City of Flowers!