Fantasy: I Can Write Letters to My Past Self

One day, Xiao Chen got a space-time mailbox, through which he could write letters to people in the past. So... [Hello, ancestor of the Nine Secrets from ten thousand years ago! I am a disciple from the Nine Secret Paths that was unified ten thousand years ago. The Taoist tradition is broken and the Nine Secrets are lost. I hope that the ancestors will take pity on the Taoist tradition and put the Nine Secrets into the twenty-fourth cave of Wanling Mountain. I will retrieve it after ten thousand years. [Hello, Empress Hongtian of the ancient times. I am your descendant for thousands of years. My family has declined, my descendants have been humiliated, and my descendants are unfilial. I hope the empress can pass down the emperor-suppressing technique and bury it under the largest birch tree in the family] [Dear yesterday self, hello. I am you from the future. Tomorrow the saint of Xianque will fall in the Demon Palace. Please go and rescue her and gain the friendship of Xianque. ……… With a letter, Xiao Chen connected to the sky and spanned eternity. Talk to your past self, the legendary strongman, and the immortal emperor one by one. Unknowingly, he has become a saint, learned the art of subduing the emperor, and holds an immortal sword. The mythical beasts rush to follow him, and the saint even throws himself into his arms. My name is Xiao Chen, One hundred million years from now, this name will be like the sun of Jiuxiao Continent, shining brightly for eternity.