{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology achieve authentication?","a":"User registration: When users register in the  system, they need to provide some personal information, such as name, ID number, etc. These information will serve as the user's identity identifier on the blockchain."}]}],"pr":"479fe82ed23ef20cbb9f9625fa4b31fc4eb41490414263157a2189afe1abdcac"}