{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the differences between private blockchains and public blockchains?","a":"Consensus mechanism: Due to the openness of public chains, a consensus mechanism is needed to elect  block creators."}]}],"pr":"c8bd91b81ebe0918e6ffe7ea9998e136f60edf1051007d64f8c275d4cfe63ab6"}