1504 This algorithm is too difficult!

Somewhere.

At a research institute.

Rotor blades were slicing through the air. A military helicopter slowly descended as it swung left and right while executing its landing on an open field behind the research institute. Zhang Ye swept his gaze around the location while in the aircraft but couldn't be sure of what place this was. In any case, it was definitely in a very remote area since it looked deserted within several kilometers. It seemed like this was a research institute isolated from the world. The area that it was built on was also very big, and there were several blocks of buildings and large yards within it. Among them were also some facilities that Zhang Ye didn't know how to describe. From time to time, heavily armed soldiers could be seen patrolling the area. There was a very high level of alert here.

What place was this?

Why was the security so tight in here?