What kind of social phenomenon existed at that time can be inferred by Oracle Bone Inscriptions.

Oracle Bone Inscriptions reflected the prevailing divination at that time.

Oracle Bone Inscriptions is basically the divination record of Shang rulers. Shang rulers are superstitious about whether there will be disasters, whether it will rain, whether there will be a good harvest of crops, whether there will be a victory in the war, what to sacrifice to ghosts and gods, and divination based on fertility, disease, dreaming and other things to understand the will of ghosts and gods and the quality of things. The materials used for divination are mainly tortoise's bellybutton, carapace and cattle's scapula. Small pits are usually dug or drilled on the back of Oracle bones for divination. This kind of pit is called "drilling" by experts in Oracle Bone Inscriptions. In the process of divination, heat is applied to these pits, causing cracks on the surface of Oracle bones. This kind of crack is called "omen" The word "Bu" in Oracle Bone Inscriptions is like a symbol. People engaged in divination judge good or bad according to the various shapes of divination.