Li Ping'an became the ninth prince of the Tang dynasty from the start and obtained a sign-in System.
To cultivate immortality, Li Ping'an had no interest in the throne whatsoever. He simply waited to sign in every day, amassing an incredible fortune in private funds.
From grain and gold to martial arts manuals and cultivation techniques...
Li Ping'an: Play it safe. I won't leave seclusion until I become an immortal!
Old steward: Your Highness, please come back! Li Papi is about to take all your private funds!
Li Shimin, eyes gleaming: Mine! Mine! It's all mine!!!
This is a book with a main character at the beginning and the end
(★ω★)+.*. Come on, author, update, the next great god is you!