A vintage 1960s-style illustration of a Chinese woman engineer in a retro Beijing office, carefully operating an elaborate brass and copper mechanical sorting machine with multiple conveyor belts, gears, and pneumatic tubes. The machine takes in scrolls and documents from one side, processes them through intricate clockwork mechanisms with spinning cogs and glass viewing chambers, and outputs neatly organized file folders and punch cards on the other side. The color palette features warm sepia tones, muted teals, and burnt orange accents. Decorative Art Deco patterns frame the scene, with subtle Chinese architectural elements visible through a window showing a stylized 1960s Beijing skyline. The engineer wears period-appropriate professional attire and operates the machine with confident expertise.