{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"The development of blockchain is rapid, but how can we ensure that new versions will not affect the applications and tools developed by existing developers?","a":"Backward compatibility: Fully consider  the technical compatibility issues with existing versions during the design of the new version, ensuring that the new version can be upgraded smoothly on the existing basis without causing disruptions to existing applications and tools."}]}],"pr":"5d270d40566413ccc72b2adba4b58d65d64d81d76491419483f44c0d0e4c2306"}