Some e-friends have a solid foundation, some are accomplished in a certain field, but they have a headache for the golden formula. It is understood that one of the important reasons is the problem of starting classes. In order to solve this problem and facilitate teaching, in 2002, Mr. Zhiyuan Jiang tried to make a golden formula prediction disk, and the effect was very good. Just dial it three times, and within an hour, you can start the class 12, which is much more convenient than computer programs. It is very helpful for people who have no foundation, good news for friends who have poor memory when they are old, and a right-hand man for lovers and researchers of the golden formula. The appearance of this plate is of great significance to the popularization and application of the golden formula prediction, which can be described as: one plate in hand, no worries about prediction.