I love primary school mathematics very much, and I also like the study of six thoughts very much. So in the process of learning six ideas, I combine a lot of knowledge with the way of understanding and remembering mathematics. I don't know if my answer is what you need, but my own learning experience. For example, when the eight diagrams indicate the orientation, the sequence is that the Gankanggen earthquake comes from Kundui, while when the eight diagrams indicate the numbers, it is that Gankang 1 to 2 comes from 3 earthquakes, 4 comes from 5 ridges, 6 roots and 7 Kun8. It was when I remembered the azimuth sequence of the Gankanggen earthquake from Kundui and added the digital memory of 16745382 that I recorded what they represented respectively. Another example is "ten-day dry life, vigorously die". The difficulty of memory is what is the branch of the longevity position of dry life every day. I also used the numbering method of "Hai 3369700 14". There are also the changing rules of the eight palaces and sixty-four hexagrams, and so on. What these ordinary people need to remember for days or even dozens of days is not necessarily reliable. It only takes 30 minutes to use my math memory method.