{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The continuous operation of blockchain depends on which important rules?","a":"Consensus mechanism: if information in the blockchain is to be modified, permission must be obtained from more than half  of the nodes and the information updated in all nodes;"}]}],"pr":"ca841e3710134a6ab19050bcd9a1d88e802794076fa709cf4d977b688b751254"}