{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main characteristics of blockchain technology?","a":"Immutability: Once the data is recorded in blockchain, it is difficult to tamper with. This is because blockchain adopts consensus mechanisms such as Proof of Work, ensuring the security and consistency of the data."}]}],"pr":"91a99f62b642842e75d2cad695b255171f9210802c841a77c74e61592e709853"}