C446 Abandoned Laboratories

"Be careful!"

Lin Mu said in a soft voice. Then, he slowly walked up a few steps and carefully observed the metal door.

The top of the door had accumulated a lot of dust. The broken metal had long since lost its sharp luster. It was obvious that it had not been destroyed recently, but a long time ago.

"This door is only the height of a person, so how did the monster enter?"

Tang Fei