{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do blockchain smart contracts ensure security?","a":"Immutable data: Blockchain uses encryption algorithms to ensure that once data is recorded in a  block, it is difficult to tamper with. This makes the execution results of smart contracts credible."}]}],"pr":"e794fda3b6583b0f566cba8bd5ff21a220b5d0fe696a6a0d4adceb3f6f571cba"}