{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the principles of blockchain technology?","a":"Block structure: Blockchain consists of a series of data units called blocks, each  containing a certain amount of data. When a block is filled, the next block is generated, forming a chain-like structure."}]}],"pr":"1b342764ccd8e4e63edb51948dd97842a47a35709979d03a57c35a139923a780"}