{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are blocks confirmed in a blockchain?","a":"Miners compete for mining: After receiving the transaction information, miners begin  competitively solving a complex mathematical problem, namely mining. This problem requires a large amount of computing power, and solving it"}]}],"pr":"31b5a41d1839eec93b3860f34015ab667109e6f79a8688008a2e6c41f120f62b"}