The Great Wall of Sword Qi Has Been Around for 30,000 Years, and You Have Become an Immortal in the World of Mortals?

Eight thousand six hundred years of Daxia. Xu Wu traveled through time and became a demon-slaying boy at the Sword Qi Great Wall on the border of the Great Xia Dynasty. In the Great Wall of Sword Qi, you have to slay demons for five years, and only those who survive are qualified to practice. Demons invade the territory and aliens attack. Everyone in the Great Wall of Sword Qi is destined to have a tragic and desolate ending. Xu Wu awakens the "Demon Illustrated Book"! "Kill the horned demon and get the reward: spiritual energy empowerment!" "Kill: Desolate Wolf, get the reward: Demon Qi turns into spirit!" "General of the Demon-Slaying Clan: Demon Monkey of Troubled Times, received the reward: Indestructible King Kong!" "Slay the green dragon of the dragon clan and get the reward: turning the clouds and rain!" After 30,000 years, there are no demons in the Sword Qi Great Wall! Xu Wu: "When I come, I will suppress the heavens!"