The cheongsam, the typical national apparel of the internal and external harmonious unity, is known as the representative of the Chinese clothing culture. It has expressed the virtuous, elegant, and gentle temperament of the Chinese women through flowing melody, rakish picturesque conception, and strong poetic emotion. The paper studies several aspects of the origin, evolution, techniques and communication to let China and the world know better about cheongsam, the national apparel of China.