{"p":"can-20","op":"mint","tick":"can","amt":"1000","rows":[{"df":"qa","content":[{"q":"How are operation modules defined in a blockchain?","a":"Account management: Realize the functions of user account creation, login, and permission control, ensuring  the security and privacy of user data."}]}],"pr":"9c112e7834d386759f86f8661b1d062e3f42796fd27d3f19d0887c408af57bfc"}