{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does the privacy protection mechanism of blockchain technology work?","a":"Permissioned Ledger: Blockchain technology allows participants to have different levels of access rights to the ledger,  depending on their roles and responsibilities. This enables the management of data access permissions and ensures that only authorized users can"}]}],"pr":"61c24b34d8168de324779c17318a8843d1765914ca4e0a8a1fc97ec64e999fbb"}