{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain solve problems in the digital advertising industry?","a":"Data security and privacy protection: Blockchain technology has the characteristic of being tamper-proof, ensuring the security of user data and transaction  information involved in the advertising delivery process. In addition, the decentralized nature of blockchain can reduce the risk of data breaches and protect users' privacy."}]}],"pr":"f0d08e7ff556c969f03f3b27af67775f6d692d2e0e46d87b720e757c54ff682e"}