How many kinds of Oracle Bone Inscriptions were there in Yin and Shang Dynasties?

The real person group in Shang Dynasty was a cultural group directly responsible for divination and lettering. Zhen people in different periods can be divided into different Zhen people groups, and different groups of Oracle bone calligraphy also show different calligraphy styles. Oracle Bone Inscriptions is a Shang Dynasty character with a history of more than 200 years, and its style is colorful, which can be roughly divided into two categories, namely, the big characters represented by Bin Group, Li Group and Unknown Group and the small characters represented by Chu Group, He Group and Huang Group. From the continuity of style, they should belong to two generations of reality groups. According to the order of the times, Oracle Bone Inscriptions can be roughly divided into:

Group Oracle Bone Inscriptions;

Inscription of bin group;

Oracle Bone Inscriptions of the calendar group;

Group Oracle Bone Inscriptions;

Which group of Oracle Bone Inscriptions;

Unknown group Oracle

Yellow group Oracle Bone Inscriptions.

It should be pointed out that the sculptor in Oracle Bone Inscriptions is not necessarily a virgin in Oracle Bone Inscriptions. Because a group of Zhen people generally includes several Zhen people, some as many as dozens, but the calligraphy style of this group is not so complicated, and Oracle Bone Inscriptions in the Calendar Group has only one Zhen person, but it presents several different forms. There is also overlap between chastity groups, which is manifested in the mutual inheritance and transition between groups.