{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How to prevent security vulnerabilities in blockchain?","a":"Pay attention to smart contract audits: When developing and deploying smart contracts, invite well-known security audit teams to conduct audits to discover and repair potential security vulnerabilities  in advance."}]}],"pr":"012a418a29ed6218bf509592e775fd794b0edaf7ae421782a2c7ccb7240cdb5f"}