The "Zhengzhang" brand was born in 1925 in old Shanghai, founded by Mr. Wu Jinzhang, a famous businessman in Shanghai. The company currently has over 700 employees. At the beginning of entrepreneurship, the company adhered to the principle of "customers are God" and adopted flexible and diverse business methods, quickly establishing an important position in the washing and dyeing industry in Shanghai. Up to now, the company's business is mainly divided into two parts: washing and dyeing services and daily detergent production.