{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"What are the characteristics of distributed ledger technology in blockchain?","a":"Security:  Blockchain adopts asymmetric encryption technology to achieve secure point-to-point communication and ensure the security of data transmission. Meanwhile, hash hashing calculation ensures the traceability of data."}]}],"pr":"2b08c110a1d45c1b55b9e308ba2836cb4615eaa6c78eb6be3436306639f93df4"}