Sign-In System: After Rebirth, I Cultivated Immortality in the City

Chu An died suddenly while moving bricks at a construction site. Chu An was unexpectedly reborn and returned to his college days, bound to a god-level sign-in system! The initial sign-in is 10 million, and comes with god-level fighting skills! Those who bullied me, humiliated me, or betrayed me in the past will definitely pay back a hundredfold! Money-worshiping ex-girlfriend? Provocation from the rich second generation? Slap him away! Does the high school beauty look at you differently? An underground tycoon takes the initiative to make friends? Don't do anything basic! Sign in! Gain god-level learning abilities! Business insight! Mysterious ancient books! Or even... The mysterious power hidden under this city? ! Wealth, beauty, power... I want them all! This is the story of a little man who was reborn and counterattacked, and by relying on signings, he gradually became an urban legend integrating money, power, force, and wisdom! The whole process is exciting and never boring!