Special Forces: You Can Defeat the Instructor Lei Zhan by Reading a Book

An Ran said that I will only grow old in this life. As a result, I was bound to the library system. While others practiced fighting exhaustingly, I became stronger by reading books. Two days later, I threw An Ran to the ground and punched him in front of Lei Zhan. Lei Zhan: Damn it? Is this the same brother-in-law who can't even hold a dumbbell?