{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the impact of blockchain technology on the digital advertising business?","a":"Protecting user privacy: Blockchain technology has the characteristic of data that cannot be tampered with, which helps to ensure the integrity and security of user data, thereby protecting user privacy."}]}],"pr":"f64f7007d90fa22f00851d4f1d543cae4e04afe7691d3a716c6bf59411c38fa6"}