Great Tang: I Became Invincible by Cultivating the Dual Cultivation Art from the Start

[A passion project written for love + an author who only finished primary school + made up on a whim + mainly about singing + weak protagonist at first + fictional organization from The Outcast + after transmigrating, I had to build a harem or I’d be letting myself down + all the beauties belong to the protagonist] I’m no good at writing blurbs. Just read it yourself.