Sallymeiqin, Q: Are you asking about Xiamen Library or Xiamen Children's Library? Well, since everyone upstairs has talked about the card handling method of Xiamen Library! I'll talk about how to handle cards in children's libraries!
The ID card of the guardian (or myself) has 80,100,200 cards (it seems to be). Is the production cost in 8 yuan or 10 yuan? To be a 80 yuan, you can only borrow from within 80 yuan, and so on.
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