{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the limitations and challenges of blockchain technology?","a":"Complexity of blockchain:  Understanding and using blockchain technology requires a high technical threshold, which limits its popularization and application in the general field."}]}],"pr":"40386cfafe0772c0bdc1872bd2c7a3d73653c9ef2b81045b2e39e15820f54a0f"}