{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the verification steps required before upgrading a blockchain?","a":"Performance Testing: Test the performance of the blockchain, including key  indicators such as transaction speed and throughput, to ensure that it can meet higher demands after upgrading."}]}],"pr":"f99c86daac280d76ca58f7d2fba71257072b6633c48aa1c1bb4b22e2b644a4b6"}