C503 Engineer Ni and Engineer Zhang

Qin Guan liked to see the changes in the other party's facial expression. Although it was just a glance, he knew that this fellow had already been forced into a dead end.

The current situation really made him feel good. Qin Guan pointed at Liu, whose expression was very ugly, and said, "Now, let's ask our host to introduce this computer's operating system to us. Everyone