City: the Mage Actually Holds up a Shield and Holds a Sword

What am I thinking? I am a mage! But I'm holding a shield! What's wrong with the shield? It's still a mage! I have experienced an apocalypse! The worlds are mapped, and monsters from all worlds appear on the earth, our favorite home. Zhou Lihai came back after rebirth and chose mage as his basic profession! But the weapon the system gave him was a shield! Zhou Lihai had no choice but to start rebuilding his life with a shield. He vowed that he would never fail like last time! He will become the strongest man in this world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.