{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the system adaptation directory set in the blockchain?","a":"Chain-based data structure: All blocks are connected with each other through hash values, forming an unchangeable chain-based structure. This structure ensures  the security and integrity of the blockchain."}]}],"pr":"1e1cfb2ebe403eacaee886ff829f3add9d3e028f1be4c783f80af62191ffdcef"}