{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What is the role of BillingAdmin in a blockchain?","a":"Setting up and maintaining the billing strategy of the blockchain platform, ensuring the fairness  and reasonableness of the billing system;\n2. Monitoring and analyzing user usage data, providing accurate billing information and bills for users;\n3. Handling user consultations and complaints about billing issues, and solving user problems in the billing field in a timely manner."}]}],"pr":"8bb7760535734cda8539141184d78779cc96e8546a67bdf271a1afdc915b7743"}