Envoys Arrive from the Start, and Half the People Die as Soon as They Enter the City

In the late Tang dynasty, an Arab embassy travels to the Western Regions. Just after entering the city, they are brutally attacked by assassins. Thirty assassins leave the two-hundred-member embassy in disarray, with heavy casualties! What a bunch of incompetents! The Tang dynasty is plunged into a diplomatic crisis. How will Cheng Yuan, who transmigrated to the late Tang by accident, solve these problems…