Do you use yarrow to divine the six' sevens'?

In the Book of Changes, 6, 7, 8 and 9 represent Laoyin, Shaoyang, Shaoyin and Lao Yang respectively. The "7" you asked stands for shaoyang, shaoyang and both are represented by the symbol Yang. Your question involves a lot, so it is not convenient to answer them one by one here, involving the number of days, places and divinations. You need to know which divination you belong to.

Less yin and less yang remain the same. If all the hexagrams are "7" or "8", "7" and "8", they are static hexagrams because there is no change.