In 2004, a metal entrance gate on Shanxi Road served as the primary access point for five separate residences. The front of the gate is equipped with individual mail slots designated for each household, thereby establishing a clear and efficient system.

Behind the gate, each slot corresponds to a physical mailbox mounted on the interior side, reinforcing the gate’s dual role as both a boundary and a daily exchange point. The structure reflects a pragmatic approach to communal living, where multiple households share infrastructure while maintaining distinct identities within a single threshold.