Pillbox of No. 7 Bridge, Caobao Road

The pillbox at Caobao Road is a concrete defensive structure from the early 20th century with observation slots and tactical positions. The building was designed to monitor the surrounding area and control the transportation routes in this part of Shanghai.

The structure was built in the early 20th century when Shanghai faced external conflicts and needed to strengthen its urban defense. It forms part of a broader network of fortifications that protected the city's important transportation routes.

The fortification reflects how Shanghai protected its strategic infrastructure during a turbulent period. The structure represents local responses to external threats and stands today as a visible reminder of this military past.

The bunker is well reached using subway line 12 to Caobao Road station, followed by a short walk through the surrounding residential street. The site sits within a residential neighborhood, so visiting during early morning or late afternoon hours is advised when there is less traffic.

The structure has preserved its original concrete walls and still displays the observation openings once used for monitoring. Among the few surviving military installations in central Shanghai, this makes it a testament to the construction craftsmanship of that era.