Conquering the Heavens, Starting with a Sign-In at the Forbidden Zone

Su Xuan transmigrates to another world and awakens the sign-in System just before he dies. “Ding!” “Congratulations, Host, sign-in successful. Reward: Ancient Sacred Physique!” “Ding!” “Congratulations, Host, sign-in successful. Reward: top-grade sacred weapon, Holy Dragon Spear!” “Ding!” “Congratulations, Host, sign-in successful. Reward…” His body is flawless, his meridians are like dragons, and an ancestral dragon dwells in his spiritual sea…