vintage 1900s photograph of harbin china railway bridge winter construction, distant view warm sunset glow over frosty horizon, midground steel truss bridge with steam cranes lifting girders, foreground many weathered chinese laborers in padded cotton coats operating hand winches near wooden barges frozen in songhua river (intricate ice cracks texture visible), period-accurate construction tools including rivet forge and pulley systems, soft dusk light casting long shadows through steel framework, brownish cyanotype color grading with slight photo emulsion degradation, hyper-detailed 16k realism capturing frost breath vapor and hammer sparks, historically accurate early 20th century engineering elements 8k