{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the scalability issues of blockchain?","a":"Limited transaction speed: As the number of blockchain nodes increases, network congestion gradually becomes prominent, transaction confirmation speed slows down, and  transaction processing capacity is limited."}]}],"pr":"78142485b0b0f489835353c35bbc4956c83f5f8e83292fb905a09a0df764cb2b"}