{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the scalability issues of blockchain?","a":"Scalability of smart contracts: The current smart contract technology is still  relatively immature, and the scalability and performance of smart contracts need to be improved to support more complex"}]}],"pr":"fcc58735ca3f3f704472735e5c6be6070b007826b63767105b94966a481ffc78"}