What do "92" and "93" mean?

In the Book of Changes, eight diagrams are arranged and combined into sixty-four hexagrams, each of which is the first, second, third, fourth, fifth and upper hexagrams from bottom to top.

In the Book of Changes, it is clearly put forward that "six nine uses", that is to say, Yin is represented by six and Yang by nine. This is because the Zhouyi is dynamic but not static, and the sixth is old yin and the ninth is Lao Yang. Only six and nine can represent sports, and things change when they get old, so the old yin becomes less yang and Lao Yang becomes less yin.

"Nine-two hexagrams" means that the second move of hexagrams is Yang hexagrams, and you can get good or bad luck by looking up hexagrams. The Book of Changes is a divination book.