{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How is a software upgrade proposal implemented in a blockchain?","a":"Submit code change requests: Developers identify issues or shortcomings in the existing blockchain system and propose targeted  solutions. These solutions usually take the form of code, including modifications and improvements to the existing blockchain protocol."}]}],"pr":"aac80a2160d01329d5524fd277bba22a417e590c109ae3283842d062f099b9f4"}