A poster with the number "5" in white, surrounded by two people painting it blue and one person climbing on ladders to paint another piece，in the style of a flat illustration. The poster depicts young professional workers wearing medical uniforms working together, with colorful cartoon elements, geometric shapes and lines, on a white background with simple color blocks. The poster has an atmosphere reminiscent of Chinese New Year, with light gray tones, and high-definition images. The design is minimalist and modern. It has an overall color scheme.