{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is the valid time of evidence defined in blockchain?","a":"In a blockchain, the effective period of evidence (evidence) usually refers to the time period from the moment the block is generated until the next block is created and linked to the current block. During this period, all participants in the blockchain network can verify and confirm the transaction data in the block. Once a new block is created, the effectiveness of the evidence in the previous block is transferred to the new block, ensuring the traceability and immutability of the blockchain data. As time goes on, new  blocks are continuously added, and the effectiveness of evidence in each block is also continuously extended. In summary, the effective time of evidence in a blockchain is from the moment a block is generated until the next block is born and incorporated into the chain."}]}],"pr":"88b892608936a8ae2494c78a51333e65231bbc6e08940dcbfd0d10fcdd4d8379"}