Rebirth: I Recreate a Big Man in Another World

When the battle formations of the ancient Roman Empire came slowly, when the war elephants of the Mauryan Dynasty were of the same era as the Mughal heavy cavalry, when the Persian Undead Army really appeared in Thermopylae. They will be disappointed to find that I have descended into troubled times with a golden finger. My name is Liu Yu, Liu Bang's Liu, Dayu's Yu. I live in a different world and just got out of the time machine. I came here just to recreate the great man!