Getting restless?
Upon hearing this news, Nie Zhenbang gave a slight nod, then turned to Xiao Zhao beside him and instructed, "Xiao Zhao, you and Xiao Song will take over the interrogation here. I will arrange for manpower to cover later shifts. Since Feng Dabiao is playing tough, let him play all the way until he willingly speaks."
This fatigue-bombing approach to interrogation is most commonly used within the public security and disciplinary committee systems. Mental torture tends to be far more painful than physical. In extreme fatigue, when even the eyelids are fighting to close, but sleep is forbidden, the agony is immense. At such times, those with weaker will are likely to seek escape. Suicide is often their first thought. Yet even suicide isn't an option, and with a desire for death, other considerations no longer matter.
In the end, everyone longs for relief. To obtain it, the best way is to actively confess and admit to all deeds, thereby seeking an end to the ordeal.