{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How do smart contracts ensure the security of execution in blockchain?","a":"Distributed ledger technology: Smart contracts run  on the blockchain, and distributed ledger technology makes data tamper-proof, ensuring the fairness and transparency of contract execution."}]}],"pr":"c9ee3675c6d691f7dc6edb8646d677a4ac35b7e6a6bb8040a6aee0f9d65d4599"}