Upper trigram
☷
Earth · Kun
Receptive yielding.
FamilyMother
ElementEarth
Hexagram 11 of 64
☷☰ Peace
Heaven below, earth above — forces flowing toward each other.
Lower trigram
☰
Heaven · Qian
Creative force.
FamilyFather
ElementMetal
The image
Earth above, Heaven below.
Earth over Heaven: receptive yielding meeting creative force.
That combination is the whole meaning of hexagram 11. Nothing about it is arbitrary — change either trigram and you get a different hexagram with a different reading, which is why the 64 form a system rather than a list.