{"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":"306bb824ebb8b86b937109484a8038a22931b3a043dfaa7d4959c01ee07e9356"}