{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the steps to upgrade the main network of a blockchain?","a":"Mainnet upgrade implementation: After the upgraded nodes  are deployed on the testnet, the mainnet upgrade can be implemented. This process usually involves stopping the service of the old mainnet, migrating the data to the upgraded mainnet"}]}],"pr":"b4c8d6e3a32547548b8207b1acd7649ee0cbb275ed4a3c5a6fb8e0901474136e"}