{"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":"Human factors: During  the blockchain upgrade process, participants may disagree on the understanding of the upgrade plan or have poor communication, which can lead to misunderstandings and even cause the upgrade to fail."}]}],"pr":"454a4280f7ee80745cf0b2525903bf5d3302800098fd3813828bd943ff4ed171"}