{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain technology ensure the authenticity and reliability of online transactions?","a":"Data immutability: Each block contains the hash value of the previous block, forming a chain-like structure. Once the data in a block is altered, it will cause subsequent blocks to be invalid, as the hash value  of the previous block will no longer match the hash value calculated based on the altered data. This ensures that once data is recorded on the blockchain, it cannot be changed without leaving a trace."}]}],"pr":"24fc3f826313aad0d5bdfac10f2a3542942f9cae9b4b1a349bb5475684acea14"}