9:16 vertical.

Realistic medium close-up side-rear view portrait, East Asian woman, long straight black hair, standing inside a subway carriage. She raises her right arm to hold a white strap ring, her body slightly turned, looking forward. She wears a loose white short-sleeved T-shirt, one side slipping down to reveal a beige lace underwear strap and edge. A black and gold handbag is slung over her shoulder.

Lighting: Bright and even subway carriage fluorescent lights, face and body are clear, soft highlights on skin and fabric, no obvious strong shadows.

Environment: Interior of a modern subway carriage, metal handrails, strap rings, blurred other passengers and digital screens in the background. Shallow depth of field, subject is sharp.

Style: Photorealistic, highly detailed hair strands, skin texture, and fabric folds, natural body language, a moment of commuting life.