What do the two hexagrams of Qian and Kun represent?
What is the mysterious connection between the two hexagrams?
Chinese people value family because " Yijing " tells us that Bafeng is a big family.

Qiankun
"Qian" is the father
"Kun" is the mother
Any three lines related to Qian hexagram are daughter
Any three lines related to Kun hexagram are son
Qian three lines are all yang:
The bottom line of Qian changes to the Yin line is the eldest daughter, that is, Xun hexagram , that is, wind.
One line in Qian changes to the Yin line, which is the middle girl, Li, and Fire.
The line at the top of Qian changes to the Yin line, which is the girl, "Dui" and Ze.
Kun’s three lines are all yin:
Kun’s bottom becomes the yang line, which is the eldest son, which is the shaking and thunder.
One line in Kun becomes a yang line, which is the second son, and Kan is the water.
The bottom line of Kun changes to the Yang line, which is the Shao Zi, Gen, and Shan.
It is not difficult for you to see that those related to Qian are all daughters, and those related to Kun are all sons. In real life, daughters in many families mostly look like fathers, and sons mostly look like mothers. This is also in line with the way of yin and yang in the Book of Changes.
Learn the Book of Changes with "Professor Zeng Shiqiang - The Wisdom of Yijing"