{"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":"Smart contracts: Smart contracts in the blockchain network can monitor the health of nodes and execute automatic switching when necessary. When a main node fails or becomes unstable, the smart contract can trigger the activation of a backup node, ensuring  the continuous and stable operation of the network."}]}],"pr":"e12d398ce1676e8e26cac8045ebc3bb408a443779a173aa653c7cac40d89f19d"}