{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the main sources of failure risk for blockchain upgrades?","a":"Technical difficulties: During the blockchain upgrade process, technical challenges such as code defects and security vulnerabilities may arise. These issues  can lead to failed upgrades or even negatively impact the entire blockchain system."}]}],"pr":"30cac3d7dcb9df4b00d230c68317566cc25767147601103a9355e99661b8082a"}