What are the inscriptions on Oracle bones and their forms and laws?

Oracle Bone Inscriptions, also known as Oracle Bone Inscriptions, is a script carved on tortoise shells and animal bones in Shang and Zhou Dynasties to record divination contents, among which Oracle Bone Inscriptions in Shang Dynasty is the most representative. In addition to small villages, Shang Oracle bones were unearthed in Houjiazhuang, Hougang and Sipanmo in Yin Ruins. Until 2003, a large number of Oracle bones were unearthed in Daxinzhuang, Jinan. Although there is no in-depth study, some scholars preliminarily infer that these Oracle bones belong to a vassal state of Shang Dynasty. It is incorrect to think that all the existing Shang Oracle bones come from Yin ruins, but the understanding and research on Oracle bones and inscriptions still mainly come from Shang Oracle bones. Oracle Bone Inscriptions is carved on the bones of tortoise shell, which has a bellybutton and a carapace, and bellybutton is mostly used for divination; There are sheep, deer, pigs, tigers and other animal bones, and the animal bones used for divination are mainly the shoulder blades of cattle. Oracle bones for divination must be corrected first, and then holes should be drilled on the back of the corrected flat Oracle bones. Drilling is to drill a circular groove on the back of Oracle bone according to a certain procedure, and drilling is to drill an oval cavity on one side of the drilled groove. When fired in the connected grooves, the Oracle Bone Inscriptions at the bottom of the grooves is thin. Once cooked, it will burst and crack on the front, which is called a sign. The vertical direction is Cho Chien, and the intersection with Cho Chien is the symbol. The word "Bu" in Oracle Bone Inscriptions's Oracle Inscriptions is a symbolic pictograph. Burning is divination, and people judge the success or failure of the asked affairs by puncturing the divination pattern composed of Cho Chien and Zhao Zhi. On the front of Oracle Bone Inscriptions, next to the symbol, the content of divination is recorded in words, which is Oracle Bone Inscriptions. This is a complicated but rigorous procedure. Oracle Bone Inscriptions followed a set of strict procedures, which laid the initial writing rules of China's calligraphy.