{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of blockchain?","a":"Security: Blockchain adopts encryption  algorithms such as SHA-256, ensuring that data is difficult to tamper with, and improving the security of the system."}]}],"pr":"4d8fc5b252d5b4fb8cd9bcc76cb6af3e5cdb716714c764d308f282b868079b21"}