{"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":"d66a87c87ab8e28372a9328013fe1b58e01c620b2ce67cb1008fd390bf09afa0"}