What does the inscription on yak skull mean?

It is generally believed that Oracle Bone Inscriptions is Oracle Bone Inscriptions, which was discovered in the early days of liberation. Before that, these bones were used in Chinese medicine, called keels!

The above words roughly recorded two kinds of information:

1, used for divination.

2. It is a record of national and social sacrificial activities or major political events.

It is a record of astronomical phenomena and time system.