{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to achieve automatic switching between main nodes and backup nodes in a blockchain network?","a":"Election mechanism: Nodes in the blockchain network elect main nodes and backup nodes  through consensus mechanisms. These consensus mechanisms can be Proof of Work (PoW), Proof of Stake (PoS), etc. During the election process, nodes select main and backup nodes that meet certain conditions, such as computing power, token holdings, etc., based on predefined rules."}]}],"pr":"2caf58a8a788abd005ad4501ab63206ec0074e3353856494036725fda711d8b1"}