Main subject: White four-engine wide-body passenger aircraft, symmetrically distributed wing engines, four straight white contrails, pure deep blue clear sky. Scene: Low-angle aerial shot directly from below, passenger aircraft flying straight upward, contrails hanging and extending, situated in a clear high-altitude airspace. Style: Aviation realistic photography, symmetric minimalist composition, combining a sense of technology and power. Color palette: Transparent pure blue sky as base color, paired with pure white fuselage and contrails, clean colors with strong contrast. Lighting: Even bright natural high-altitude light, sharp light and shadow on fuselage lines, no excess stray shadows. Composition: Absolutely symmetric layout in center, passenger aircraft positioned exactly in frame center, contrails vertically stretching for visual depth, simple yet highly impactful. Use cases: Aviation travel theme posters, civil aviation brand promotion, technology exploration background, visual elements for distant travel inspirational themes.