{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How does blockchain improve the efficiency of data trading?","a":"Security: Blockchain utilizes cryptography to guarantee the security of data transmission and access, preventing data  tampering and forgery."}]}],"pr":"9342b6856611cd99df596701e7b857b731952af2d0fd44249a0702b3ce099fcd"}