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 fitted with individual mail slots designated for each household, establishing a clear and efficient system for exchange.

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