Gate on walled-off area: The city of wrongful death
People in walled-off area:
"Wrongful" death here means a premature death brought about through one's own hands. The victims here all still bear the marks of suicide, from slit throats to protruding tongues. As Wolfram Eberhard described their predicament in hell:
They suffer here for months or years and then are brought back to the scene of their suicide. Here, they again suffer hunger and thirst, as they are not allowed to eat the sacrifices. But if they behave and do not appear to frighten people or induce other people to serve as their replacement by inducing them to commit suicide, they return to hell number one and receive only the punishments for their remaining sins.
In some interpretations, these people who did not fulfill their predestined lifespan must stay in this city until that lifespan is complete, at which point they then proceed through hell as normal.
A second example of the "City of wrongful death" from another hell scroll.
Suicide by hanging as depicted at Fengdu, the City of Ghosts.