In Shenchu City, every Martial Artist has only one identity, and that is a prisoner.
Because of this, Shenchu City deters those who have not yet committed a crime but have criminal intentions, making them afraid to commit crimes.
At critical moments, the existence of Shenchu City can also halt criminal actions.
Sometimes the role of deterrence is more important than punishment; it is the necessary power to maintain societal stability.
Thirdly, there's reform.
Being imprisoned doesn't necessarily mean one is heinously evil; some people commit crimes perhaps out of desperation.
No matter the crime, except for death row prisoners, from the moment you step into prison, while atoning for your sins, you also have the opportunity to reform.
Many Martial Artists have repented in this Prison City.
When they return, they may even become invaluable talents.
