{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the possible paths that may occur in the upgrade process of a blockchain?","a":"The possible paths  in the upgrade process of blockchain include:↵↵1) Hard Fork: Due to inconsistencies between new and old version clients in the blockchain network, some nodes are unable to reach consensus, resulting in the formation of two independent blockchains.↵↵2) Soft Fork: This is a more harmonious upgrade approach where new and old version clients coexist on the same blockchain network. The old version clients automatically follow the rules of the new version clients.↵↵3) Rollback: When serious problems are discovered in the blockchain, they can be repaired by rolling back some or all transaction data.↵↵4) Optimization and Improvement: Continuously upgrading blockchain technology to enhance performance, security, and scalability."}]}],"pr":"3eb962226a5256f7f9b6ee75f2348ab71aa1ab4085e834eb731ecb8428d5dcb8"}