Ningbotang leisure suits ltd. Is a direct enterprise of the ningbo group, and ningbotang leisure suits ltd. Was established in 1994. The company has been in the business of leisure clothing for many years and has its own mature brand, "tonlion tong lion". "f4" is the newer brand of the company after the "tang lion" and is aimed at increasing competition in the entertainment industry in the current market, increasing product homogeneity, following the current trend, boldly creating, incorporating more fashion elements in product design, breaking through the existing market's product architecture, which is dominated by sport and leisure, creating a unique culture of fashion and recreation, building a life of excellence for modern urban people, such as fashion (fashion), faultless (very good), felicity (happiness), fascination, and fascination, opening up new areas of recreation and meeting broader market needs。