How is each hexagram named?

six names: from bottom to top, they are: first, second, third, fourth, fifth and last.

according to yin and yang, it is (still from bottom to top) that the yang is the first nine, and the yin is the first six.

yang divination: the ninth day, the second day, the third day, the fourth day, the fifth day, the ninth day,

yin divination: the sixth day, the second day, the third day, the fourth day, the sixth day, the sixth day, the sixth day, the sixth day, the sixth day, and the sixth day.

Orders: dry divination is followed by nine. Kun hexagrams are useful after six.