The post sign of China is green. The adoption of green as the special color of China postal symbol was decided at the first national postal conference held from 1949 12 10 to 28th, which symbolizes peace, youth, exuberance and prosperity. China postal logo is a combination of "Zhong" and postal network image. And the shape of wings is integrated, which reminds people of the image metaphor of "Hongyan passing books" in ancient China for information transmission. Expressed the corporate purpose of serving thousands of households and the corporate image of fast, accurate, safe and ubiquitous. The sign is concise and powerful, mainly composed of horizontal and vertical parallel lines, representing order and extending in all directions; Tilting slightly to the right shows a sense of direction and speed.