Majority of the people who lived in this apartment were either tenants who had lived here for a long time and were thus unwilling to move out, or those who had low budgets and low savings like He Juan.
The apartment might be old with questionable security and malfunctioning services, however it was cheap and located near the train subway and police station. It had always been managed by Grandma Li who did not have any relatives in this world.
All this while, the apartment had always been safe and sound. Even if there was trouble, it was only limited to disagreement between tenants or small arguments that could be solved easily. This was the first time that something like murder had happened here.