{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the potential risks of blockchain upgrading?","a":"Data security risks: During the  upgrading process, data loss or leakage may occur, posing a threat to user privacy and assets."}]}],"pr":"b13328e419b1ec623408203a43c520536a22ad12b184f5dc2cdf785c74368bac"}