{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do validators in a blockchain prove their identity and background?","a":"Obtain identity information: Validators  need to obtain a personal identity certificate, which usually"}]}],"pr":"e28487c1cacb4f10bac455b88bc80f6138d6174c9cae3311826bf22650fb946f"}