Use the uploaded black-and-white photo as the geometric and tonal source. Apply restrained, period-plausible color to clothing, vehicles and architecture; supplied color references override guesses. Preserve grain, shadows, highlight separation, faces, signs and crop. Use muted colors for unknown details, avoid modern saturation, and never fabricate signage. Return one colorized photograph. Treat unverified colors as interpretive.

以上传的黑白照片为构图和明暗依据。给服装、车辆和建筑加入符合年代且克制的色彩；如有颜色参考，以参考为准。保留颗粒、阴影、高光层次、面孔、招牌与裁切。未知区域用低饱和色，不添加招牌。输出一张上色照片，未验证色彩属于推测。