I am now a primary school mathematics teacher in a mountainous area, but who would have thought that such a teacher who teaches and educates people was once a crook in a casino? Over the years, I have won a lot, but lost even more. Not to mention a thousand generals and eight generals, or a sure-fire game, these are too far away for most ordinary people. In fact, the game has often been laid for you the moment you come to the table. I wrote this book in the hope that more people can read it and stop stepping into this abyss.