I wrote a hundred million letters to the past

Lynch suddenly got a blank 'letter paper' with a blank envelope inside as if by magic, he wrote a sentence [you must take her!] then a lovely little girl jumped out later, the envelope appeared again, and Lynch tried to write down [buy Penguin shares!] then he became a multimillionaire the next day then Lynch wrote to himself crazily, learning to cook, play the piano, write songs and compose music until one day, he suddenly found that This letter paper can not only write to yourself PS: this book is also known as "my father can do a hundred million things" and "my omnipotent father"