{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the advantages of blockchain in data storage?","a":"Secure and reliable: Blockchain technology has high security, effectively preventing hacker attacks and data breaches. Through smart  contracts, blockchain can ensure the security and reliability of data storage."}]}],"pr":"f0c3f02e83ca598a1844de58d7fea57c05393045a07a3504a2c3912705468243"}