{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the security challenges in the implementation of smart contracts in blockchain technology?","a":"Security issue: The design of the smart contract system aims to build a trustless environment, but it also means that once an error occurs, it cannot be corrected. Therefore, ensuring the security of smart contracts has become  a key issue."}]}],"pr":"cc4de4a93f56ec74d5f6bd9d167c206fa61b1e74c52288efd5a4c8dbf767381b"}