There was a letter to Grandpa in Van's card. What was the content of the letter?

"Grandpa's Contract Book" is a mystery novel written by Yongan Black Uncle 1. The general plot of this novel is: Chen Jing had a book left behind by his deceased grandfather. It was said to be a contract. It was said that this contract book could pass through the dimensional barrier of space and go to the fantasy world to realize his dreams. At first, Chen Jing did not believe it. He thought that it was a relic of his grandfather and that he had left it as a memento. However, one day, this contract book actually emitted light and a picture appeared… ---------------------------- One Piece's Strongest Relationship was a light novel written by the author, Yipin Moxiang. The general plot of the novel was: Su Qiuming, a veteran sea fan, transmigrated to the world of One Piece and became the grandson of the Warring States Period, Ricardo. Beckman looked at the familiar figure in front of him and Ricardo decided to see the world! However, what happened later was beyond Ricardo's expectations! Sengoku: My grandson will definitely be stronger than Karp! Karp: " When you're out, run if you can't beat them! Come back and tell Grandpa. Grandpa will avenge you!" "Kid, don't you know that your maternal uncle is the eldest?!" "Riley, let's see whose successor this world is waiting for!" Ben Beckman: " My nephew, I will educate myself. You guys, don't move!" "Ricardo, I just want to hear you call me dad!" ---------------------------- " Mrs. Li Is A Little Sweet " was a modern romance novel written by the author, Cass. The general plot of this novel was: It was a farce. Her adoptive father's family threatened her to marry Young Master Li, who was crippled in both legs, on behalf of her sister. She heard that he wasn't interested in women. As long as she completed the mission, she could leave perfectly. But was this really the Eldest Young Master Yan who was said not to get close to women? And his leg…when did it recover? "Mr. Li, please get a divorce." Step by step, he forced her into a corner and leaned close to her ear." Wifey, you promised to take care of me for the rest of my life. You can't abandon me after you've cheated on me." ---------------------------- " Reporting to My Husband: Filing for a Divorce " was a modern romance novel written by the author, Mu Yanyu. The general plot of this novel was: " Young Master, Young Madam is with a man." "That's his brother." "Young Master, Young Madam is secretly writing love letters in her room." "It's for me." "Young Master, Young Madam asked someone to send over a document." "Open it and take a look." The servant lowered her head and said in a barely audible voice,"The divorce contract."  They met again after so many years, but she no longer remembered him. She already had another man and child by her side. "Daddy, isn't that my mommy?" a baby asked crisply. " Coax her over. All my assets are yours." "If you die, won't the assets be mine?" The milk child asked with a blank face, scheming in his heart. "Get lost!" ---------------------------- " Giving Grandpa Money, Invincible in the World " was a novel written by the author who only ate buns and skins. The general plot of this novel was: Introduction. What introduction? There was no introduction to the book. A novel that the author didn't even know what was written… ---------------------------- " Grandma Is Sixteen " was a fantasy romance novel written by the author, Jing Feichen. The general plot of the novel was: What would you think if one day a kid suddenly popped out of the house and called you "Grandma"? Alright, every woman would become a 'granny'. Don't glare at me, I'm telling the truth. I suddenly have a five-year-old grandson. No one will believe me. But this strange thing happened to me. However, seeing that the kid looks quite cute, I'll take him in temporarily. Wait, he said he was going to look for his grandfather? Where could he find one? There's even a name and address? Alright, then I'll 'reluctantly' go and meet my future husband. But that's not right. My dear husband actually has a twin brother. Hmm, or perhaps a twin brother? Which one is my husband? However, after a long time, he felt that the little brat was acting sneakily. Are you hiding something from me? ---------------------------- " Dad, How Did You Transmigrate?" was a fantasy novel written by the author. The general plot of the novel was: One day, Xu Jian sent a message claiming that it was his biological father who had passed away many years ago. He said that he had transmigrated to another world for many years and now needed his help to save his mother. This help involved all of his savings. Xu Jian, who was skeptical, chose to give it a try. ---------------------------- Time is like a hook, Grandma's orchid and fruit is a modern romance novel written by the author, Love God. The general plot of this novel is: Ever since she was young, Grandma had been told that she was a useless person. Other people's children had names, but she only had the second girl and lived a nameless life. Other people's children were doted on by their mothers, but her mother was only busy giving birth to a son for her father. Until she met him. He taught her how to read and love herself, making her feel that she was valuable too. ---------------------------- Mrs. Doughty was a fantasy romance novel written by the author. The general plot of the novel was as follows: The three advantages of a nanny father were protective, bad, and good-looking. Little Friend Mu, I came for the last point. ----▼▽--▼▽---- Hey, Dad, look, the weather is good today. ^^ I promise, I will let you dance for a lifetime… ---------------------------- Inheriting Grandpa's Legacy, I Become a God in a Ghost Stories World was a sci-fi novel written by the author, Chu Liuxian. The general plot of the novel was: Ji Zhuo accidentally found two old letters and a notebook when he entered the folk museum left behind by his grandfather. The notebook was filled with thrilling, strange, mysterious, mind-blowing, and vulgar strange stories, as well as a large number of strange patterns that looked like scribbles. At first, Ji Zhuo thought that these were his grandfather's random scribbles until he entered a word game called [Adventure Paradise]. Only then did he realize. The content in his grandfather's notebook was actually a " survival guide "…