University of Bristol - Historical Photographs of China reference number: Ro-n0832. This might be the East Gate? The Chinese name of the Kiangnan Arsenal was the General Bureau of Machine Manufacture of Jiangnan (江南機器製造總局) or the Jiangnan (or Kiangnan) Machine Works for short. See Pe01-128 (which is a view from the other side of a gate at the arsenal).
One of the gates to the Kiangnan (Jiangnan) Arsenal, Shanghai