Space-Time Mailbox: I Can Write Letters to My Past Self

If you could write a letter to the past, what would you do? Make up for regrets? Make some money? Lin Chuan's choice is to become a manipulator of history and a guide for civilization! With the help of a mysterious space-time mailbox, he pointed out his past self and transformed from an unknown ordinary person to a hero admired by thousands of people, with both wealth and beauty. But this is just the beginning. "Mr. Einstein, regarding the controllable nuclear fusion equation..." "Mr. Cao, there should be no regrets about a dream in the Red Mansions!" When the entire history of the world changed its direction because of him, the Dragon Kingdom rose to an unprecedented level. Until one day, a letter from the future... A warning was issued to Lin Chuan!