What is this divination, that is, one is old Yin, the other is less Yin San, the fourth is less Yin, the fifth is less Yang, and the sixth is less Yang in Lao Yang?

Up and down, gradually. One hexagram is usually called the first hexagram, and six hexagrams are usually called the last hexagram, which is a term.

In the six hexagrams, Lao Yin and Lao Yang changed, Yin became Yang, and Yang became Yin. For example, your first divination is gradual divination, and the first divination and the third divination are all changed. After the change, it becomes an upward shock, which is beneficial to divination!