Carbon stick sketch portrait, realistic face to abstract lines AI Image Prompt

Based on the first reference photo, generate a portrait drawn with carbon stick pen sketch style, head portrait of a person facing slightly sideways, facial features close-up: 1. Only keep the face (finely realistic depiction of expression and features, clear details); 2. Clothing treatment: keep a small amount of realistic details on the collar, achieving a clear transition from realistic face to abstract lines of the body; 3. Background: only in the area behind the left side of the neck, fill with manually drawn double-layer gradient hatching: inner layer with high-density compact pencil lines (dark), outer layer with low-density loose pencil lines (light), forming a dark-to-light transition, with clear and regular edges; 4. Overall pure black-and-white pen-and-ink texture, no color, presenting a hand-drawn sketch effect. Presented in a photographic realistic style, on realistic sketch paper with slight frayed edges and signs of use, depicting a character's temperament portrait with a calm and restrained aura, with delicate and realistic facial details, but slightly rough and casual strokes on clothing and background, adding a relaxed artistic feel. At the lower left corner, a scrawled English artistic signature written in pencil, natural top light evenly spreading over his face, softly outlining facial contours, making the layers of skin texture clearly visible, overall image texture thick and delicate, full of charm.