What clues did Oracle Bone Inscriptions provide in the Yin and Shang Dynasties?

Oracle Bone Inscriptions in the Shang Dynasty provided important clues for Li Yin, mainly including recording the sun with 60 branches and the moon with its profit and loss cycle. The big moon is 30 days, the small moon is 29 days, one year 12 months, and sometimes 13 months. This is a leap month, and it is generally believed that "the southern solstice" is the winter solstice. This shows that Li Yin has the characteristics of combining the Yin and Yang calendars, and it has been used as a tradition for the later calendars for thousands of years.