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Also, is there a denomination on these coins?
The denomination is "1 cash", also known as a "wen" in Chinese. When the silver dollar was adopted by the Empire as an official currency unit in the mid-1800s, the cash was officially pegged to the dollar at 1000:1, making the cash worth 1/10th of a cent.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis