The Battle of Sihang Warehouse took place from October 26 to November 1, 1937, and marked the beginning of the end of the three-month Battle of Shanghai in the opening phase of the Second Sino-Japanese War. Defenders of the warehouse held out against numerous waves of Japanese forces to cover Chinese forces retreating west during the Battle of Shanghai.
Accounts from Chinese/Western and Japanese sources on the Defense of Sihang Warehouse vary in nature, with both Chinese and Western accounts remembering the conflict as an excellent defense against a vastly numerically superior enemy, while Japanese records point to the defense being a relatively unremarkable event within the entire Battle of Shanghai.
Wikipedia https://en.wikipedia.org/wiki/Defense_of_Sihang_Warehouse
Coordinates 31°14'32.185" N 121°27'59.685" E