{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can blockchain be applied in the field of digital identity authentication?","a":"Based on blockchain, anonymous identity authentication can be  realized, which allows users to verify their identities without revealing their personal information."}]}],"pr":"68bd11ad096a99eeb88e68a938168381998b9bdaa7272048030104960d97c371"}