{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the real problems faced by the development of blockchain?","a":"Mass adoption: Although blockchain technology has received increasing attention and  recognition, it still faces the challenge of mass adoption. How to promote the"}]}],"pr":"cff3329adad7e7c523a3178ae7c3144a10fcc46e400ec59e90d574957a943af7"}