A classmate bought a bamboo pen container in an antique shop, on which a lot of Oracle characters were engraved, and the content and font were exactly the same as those in our textbook.

Oracle Bone Inscriptions is made of animal bones and tortoise shells. At first, the tortoise shell was baked with fire, and the cracks in the burnt tortoise shell were used for divination, and then the results were engraved on the tortoise shell. Later, it gradually expanded to animal bones.

How can a fortune teller like Oracle Bone Inscriptions appear on bamboo wares?

If it is the same as your textbook, it is even more wrong. No two Oracle Bone Inscriptions are the same.

The earliest bamboo slips found now are only from the Warring States period.

It seems that no one has seen the bamboo wares of the Shang Dynasty. Can it be kept in a vacuum-sealed jar?