Studio portrait of a Vietnamese male in his mid 40s; light-medium skin, neutral undertone; salt-and-pepper hair worn shoulder-length, neatly tucked behind ears; clean-shaven; wearing a plain charcoal knit sweater, no logos; neutral mid-gray seamless backdrop; Rembrandt lighting with soft fill, neutral color balance; 105 mm macro-sharp, f/7.1, ISO 100, ultra-high detail, crisp texture, no haze. Expression: gentle and thoughtful, subtle smile. Framing: portrait orientation, 3:4 ratio; mid-chest-up.