Mercenaries are a profession far away from the secular world. They not only fight for money, nor are they as cold-blooded as we imagined. They also have passionate passion and selfless dedication, and they also have brotherhood, life and death, and romantic love that ordinary people cannot understand. Their declaration is that as long as I am alive, they will never let my brothers fall; their oath is that as long as I can still fight, they will never let the enemy trample on our dignity.