From the inside to the hardcover, I made it by hand. The inner pages were made up of twenty-six letters and twenty-six sentences reminding people of traffic safety. Each letter was made up of different stories about traffic accidents. The cover was made of gauze and gave people a sense of security. Some pages had interactive sections to make the book more interesting. The readers could change the fate of the person in the letter while they read the books and flip over the pages.