Design of poster hand-drawn in red and blue

Quick answer：

The term '招贴设计手绘红蓝' refers to the art of poster design created by hand using red and blue colors. This style often involves illustrative techniques and is commonly used in advertising, graphic design, and artistic expression. Hand-drawn posters can be found in various forms, from street art to professional advertisements, and are characterized by their originality and artistic flair.