{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How can the security of blockchain be ensured?","a":"Immutable ledger: Once data is recorded on the  blockchain, it cannot be altered or deleted. This feature ensures that any attempts to"}]}],"pr":"39317848572012abd442f0bbf448cc15dd2ef39ee44f0dd071bd86e743a9f8cc"}