{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do you handle duplicate data detection in a blockchain?","a":"Data on-chain: First, the data  is entered into the blockchain system, and each data unit generates a unique hash value."}]}],"pr":"131214b42148191b1bf5cb880c7529b45fc84c285341ef80c3834c866bdac771"}