Excuse me, what is the meaning of "Four-poster Yin Na" in the constellation?

The Chinese character consists of eight branches (exactly eight words): annual branch, annual branch, monthly branch, monthly branch, daily branch, daily branch, * * and so on. Each combination is called "column", which forms "year column", "moon column", "sun column" and "time column", so the eight characters are also called "four columns" or "four columns and eight characters". Yin Na is a widely used method in trick prediction, and its corresponding mathematical theory has been roughly defined by Yin Na in Sixty Jiazi, and its basic meaning is still expounded by Wuxing. The sound of "Yin Na" is a pentatonic scale determined by different scales in ancient Chinese. Five tones are not the mystery of nature, but are artificially prescribed. Five tones are not three tones, nor seven tones, because three tones are too few to express the change of melody, and seven tones are too many and too complicated for the ancients to master, so "five tones" is the best. In fact, there are more than five notes in the scale now. Therefore, the "five tones" itself is not mysterious.