What are oracle bones and what purpose do they serve?

Oracle bones provide us with one of the earliest examples of writing in Ancient China. They also have given historians useful information about the Shang dynasty.

Oracle bones were usually made from the shoulder blades of oxen, or sometimes the shell of a tortoise was used. They were used to divine the future.

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keeping a cash reserve because cash flow is the the movement of money through a company and if it just sits there, it wont the movement