The police station's duty room naturally isn't that easy to enter or exit, as there's definitely someone on duty to keep watch.
But they aren't very attentive.
On one hand, there are no especially brutal criminals; those people were either executed by firing squad last year or have already been transferred to prison. Most of those squatting in the station are residents from nearby, and since the police know exactly where your home is, they're not worried about you running away.
On the other hand, it has to do with the local customs of Tianmen City.
In short, it's all about the heavy Jianghu World atmosphere.
Jianghu, Jianghu, as the name suggests, must be by the water to be considered Jianghu.
Tianmen City has a thriving canal transport system and a prospering maritime industry, creating a distinctive Jianghu ambiance not found elsewhere in the North.
