{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain technology be applied in the field of data privacy protection?","a":"Permission control: Blockchain technology allows data access and operation to have certain permissions. Only after"}]}],"pr":"f68651af6e505bdccd55d51a27dfeb0e56d5ee88430fe462cf0ddc9a98b5ab9a"}