```
Central hall.
The entire hall seemed somewhat quiet, as many seated below continued to stare at the whiteboard, still studying the proof of the NP problem displayed on it.
Among them, some were somewhat dissatisfied because the proof process for the NP problem did not come with any explanation. They had watched for over an hour, only to see someone writing on the board, feeling it was the most empty proof presentation they had ever witnessed.
These individuals primarily struggled to follow the train of thought; they could keep up with the proof process at the beginning, but later, they could only sit and watch.
