{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"In a blockchain, how is a trustworthy clock constructed?","a":"In blockchain, the construction of a trustworthy clock is primarily achieved through distributed ledger technology and consensus algorithms. Firstly, blockchain adopts a decentralized network architecture, where data is not controlled by a single center, but stored and transmitted across multiple nodes, ensuring the authenticity and reliability of the data. Secondly, the distributed ledger technology in blockchain records and synchronizes data in real-time,  with each node having a complete ledger, thereby ensuring data consistency. Additionally, blockchain uses consensus algorithms to confirm and validate transactions, such as Proof of Work and Proof of Stake, etc. These algorithms enable nodes to reach agreement on the validity of transactions and prevent double spending, ensuring the trustworthiness of the blockchain system."}]}],"pr":"a5902518c140d54898bccfe216cfc96531d13f5283ee42623c946eddf8163093"}