The Fool Prince Starts the Game, I Open the Gate of Heaven with One Sword

He was originally a "lunatic" in the royal palace, born with strange phenomena, but he was robbed at a young age and his intelligence was completely destroyed. However, the protagonist accidentally awakens the "sign-in system" after traveling through time, and has more than 4,900 days of sign-in rewards. Once he awakens, he has magical powers and a mountain of treasures! Seven days later, on his 18th birthday, the palace is about to be stormy. Murderous intentions of the imperial power are surging, enemies and friends are waiting around, and dangers are everywhere. Everyone thought that this birthday banquet was the funeral song of power and the end of the madman. As everyone knows, on the night of the stormy night, the protagonist opens his clear eyes, holds a peach blossom branch, steps into the sky, and opens the gate of heaven with a sword! Since then, the former madman pointed his sword at the sky and stirred up the world. Who dares to call me crazy? With just one sword, I can conquer China!