The relationship between Liuyi, Huozhulin and Buyi's addition and deletion

These are all six-point prediction methods, referred to as six-point prediction. Your name is an ancient book, so it is different from the present one, but the prediction system is exactly the same as the modern one. If you want to learn six ideas, you can read more books and CDs by Mr. Li Hongcheng. There are free CDs on the Internet, from beginners to experts.