If you want to understand the descendants of the dragon
then you have to study the scales and bones of the dragon
jia3 is the image of a turtle’s shell, on which ancient characters were written. SHELL, SCALES (of an animal or armor)
gu3 is the image of a skull on top of a ribcage, it is the bones on which ancient characters were written BONES
wen2 is the image of a person standing tall and stretching out proudly to describe CULTURE LANGUAGE
Jia gu wen is normally translated into English as: oracle bone script. The oracle bone script is the earliest and most complete writing on earth.