Luke paid no attention to their expressions. "Secondly, after taking cover first and ensuring your safety, you can't abandon the initiative either. You must cautiously observe the enemy's situation at once. I recommend that everyone carry a small item on you.
"A mirror." Luke took out a mirror half the size of a fist from his chest pocket. "Mine is made of stainless steel. It's durable and cheap. If you keep it in your chest pocket, it might stop a bullet for you some day."
Seeing their expressions turn even stranger, Luke chuckled. "From my personal experience, a living cop is always more useful than a dead cop, so don't be so quick to stick your head out; try to make use of tools."
