What does Ceng Zhiqiang's Book of Changes mean by * * * six hexagrams of less yang and less yin?

In the Book of Changes, six, seven, eight and nine are used to represent Laoyin, Shaoyang, Shaoyin and Lao Yang.

Nine for yang and six for yin.

Because nine is Lao Yang and six is Lao Yin.

For example, the dry divination of Quanyang Yao is calculated from bottom to top as follows

ninth

gibberellin

Jiusan

Jiu Si

Emperor throne

Shangjiu

For example, the Kun hexagrams of Guanyin Bodhisattva are calculated from bottom to top as follows

sixth day

Liuer

Sanliu

June 4(th)

Sixty-five

Shangliu

For example, the water-blocking hexagrams crossing Yin and Yang are counted from bottom to top.

sixth day

gibberellin

Sanliu

Jiu Si

Emperor throne

Shangliu

That's clear enough, hehe, plus an adoption.