Subject: Big-eyed cute cartoon little boy sitting on soft fluffy clouds, holding a bubble wand and blowing bubbles; inside the largest transparent bubble is a three-dimensional gradient number "61" shape with a gaseous texture, and inside that bubble is another little boy happily stretching his arms while standing in front of an amusement park; the other small bubbles floating around each contain cartoon little boys in different states: playing in sand, rowing a boat, and flying a kite. Scene: A dreamy high-altitude cloud scene, background is a clear high altitude filled with fluffy marshmallow-like clouds; inside the largest bubble is a fully equipped childlike amusement park scene, the other small bubbles respectively correspond to children playing scenes on a beach, a lake surface, and an outdoor countryside. Style: 3D cartoon style, Pixar animation texture, round and cute figures, overall full of childlike innocence and healing sense, fine modeling, all elements have soft edges without sharp corners. Color palette: Overall bright and fresh macaron tones, with light sky blue as the base color, paired with soft sweet low-saturation colors such as light pink, goose yellow, light purple, and light green, the visual effect is soft and comfortable. Lighting: Bright and soft natural sunlight on a clear day, light is transparent and even, transparent bubbles have iridescent reflections and a see-through effect, figures, clouds, and number shapes have natural and soft faint shadows, overall no strong contrast between light and dark, lighting is warm and comfortable. Composition: Vertical composition, visual focus of the画面 is centered and slightly upper, the little boy sitting on the clouds in the lower right corner is the foreground, the central large bubble is the core visual focus, the other small bubbles are scattered around, overall layout is layered, with sufficient blank space, visually stretched. Purpose: Vertical festival promotional poster, suitable as vertical material for brands to take advantage of festival promotions, relaxed and healing atmosphere, suitable for mobile terminal communication and display.