As Chen Xin was considering how to make snow treads, the atmosphere in the city was becoming increasingly tense.
Although on the surface everything seemed calm, beneath this facade was a looming tempest ready to erupt.
Each main shelter entrance was guarded by a strict checkpoint manned by city management personnel, police, and armed police, enforcing rigorous checks on everyone entering and exiting.
Management personnel were responsible for identity checks to ensure that everyone passing through had verifiable identities and possessed shelter residency permits and passes issued by the city government.
This management system was only implemented after the disaster; though residence and travel permits were used before, enforcement was not as stringent, much like IDs before the disaster.
