{"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":"f79812038295a05264a6ae987889d5dc37719694939d24cd62f3738e342defbb"}