The Black Tech Monopoly Corporation - Chapter 59
When Zhang Heng came to the door of the command center he saw the barrier gradually opening up.
The barrier on the wall was about half a meter thick and was forged from some black alloy throughout its entire structure. Gashes, which were apparently left by the xenomorphs, were vaguely seen on the wall. However, one would be able to tell how unusually strong that wall was by comparing the depth of the marks left on the wall with those in the other parts of the ship and the completely busted metal doors elsewhere. The marks left on the wall of the command center were very shallow.