Pillbox of No. 7 Bridge, Caobao Road, Military pillbox at Caobao Road, Minhang District, China.

The Pillbox of No. 7 Bridge, Caobao Road, is a two-storey brick blockhouse built by the Japanese army on the south side of the bridge's east end during the Second Sino-Japanese War. It stands on the north side of the eastern embankment of the No. 7 Caobao Road Bridge (Puhuitang Bridge) in Qibao Town, within Minhang Cultural Park. Beside it are a monument to revolutionary martyrs, a commemorative sculpture for 37 PLA soldiers, and a statue of a PLA soldier.

The Japanese army built a two-storey brick blockhouse on the south side of the bridge's east end during the Second Sino-Japanese War, when Qibao lay west of the Qingxiang blockade line. In January 1949 Tang Enbo added it to a chain of concrete bunkers along the south bank of Puhuitang. PLA soldiers of the 27th Army's 81st Division took it in May 1949 after a three-day battle.

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 blockhouse stands on the north side of the east bank of No. 7 Bridge (Puhuitang Bridge) on Caobao Road in Qibao Town, inside Minhang Cultural Park. The site was reopened with the park's second phase on 23 March 2014. Look for the monument to revolutionary martyrs, the commemorative sculpture for the 37 soldiers of the 81st Division, and the PLA soldier statue beside the blockhouse.

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.