{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do Directed Acyclic Graphs (DAG) change the traditional structure of blockchain?","a":"Transaction Validation:  In the DAG structure, each newly added transaction needs to select two unverified transactions for validation, thereby changing the single block validation method in traditional blockchains and improving the flexibility and efficiency of validation."}]}],"pr":"938f3a91152c4395c644c479ca3ff8b14d2714471474c985369c4012cf242786"}