How did Oracle Bone Inscriptions make it?

Oracle Bone Inscriptions is an ancient script in China, regarded as an early form of modern Chinese characters, sometimes regarded as a script of Chinese characters, and also the oldest mature script in China. Oracle Bone Inscriptions is also called Wen Qi, tortoise shell or tortoise shell animal bone. Oracle Bone Inscriptions is a very important ancient writing material. Most Oracle Bone Inscriptions were found in Yin Ruins. Yin Ruins are famous sites of Yin Shang Dynasty, including Xiaotun Village, Huayuanzhuang and Houjiazhuang in the northwest of Anyang City, Henan Province. It was once the capital of the central dynasty in the late Yin Shang Dynasty, so it was called Yin Ruins. These Oracle Bone Inscriptions are basically the divination records 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. Heating these pits during divination leads to 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. According to Oracle Bone Inscriptions in the Shang Dynasty, Chinese characters at that time had developed into a complete Chinese writing system. In the discovered Oracle Bone Inscriptions of Yin Ruins, the number of words has reached about 4000. There are a lot of signifiers, pictographs, knowing characters, and many pictographs. These words are very different in appearance from the words we use now. But from the point of word formation, they are basically the same.

————————— The above content comes from Baidu Encyclopedia.

Let me add one more thing.

Drilling holes in tortoise shells or animal bones (the drilled parts become fragile) and heating them on a fire will cause this part to crack when heated (this is thermal expansion and cold contraction), and the lines formed are called "signs" ("signs" are hieroglyphics themselves, just like cracks).

Interpret the result of divination through "omen", predict whether something goes well, and then carve the result on tortoise shell or animal bone. This is Oracle Bone Inscriptions.

(PS: I just went to Yinxu in Anyang, Henan a few days ago. Oracle Bone Inscriptions is really awesome! )