{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"Why do we need to consider forward and backward compatibility when updating and adding new features to blockchain technology?","a":"Maintaining system stability: Forward compatibility means that new features should be able to adapt to older versions of  the system, avoiding system crashes or data loss issues caused by updates. Backward compatibility requires that new versions of the system should be able to support older features, ensuring that users are not affected after upgrading."}]}],"pr":"1f3a82677ffac969f33ec9155cdcc5d0dc3c1a415373b019ab8c9ff60ded1b09"}