Weifang Zhongji Rainbow Precision Machinery Co., Ltd. is located in the world's kite capital. It is a printing equipment manufacturing enterprise integrating design, research and development, production, domestic (foreign) sales, and technical services. After years of efforts, it has established the "Zhongji Rainbow" brand recognized by the market.

The company's current products are categorized into three main types: offset printing equipment, coding platform equipment, and bookbinding equipment. The offset printing equipment category encompasses multiple series with dozens of models, including multi-function page-matching printing machines, double-sided machines, unit-type multi-color machines, and single-color offset printing machines. The coding platform equipment category features two series with various models, such as roll-to-roll paper feeding platforms and sheet-fed paper feeding platforms. The bookbinding equipment category includes two series with multiple models, namely rotary printing machines and bookbinding machines. These products are diverse in variety, of excellent quality, stable in performance, easy to operate, and convenient to maintain. They are suitable for large, medium, and small printing factories, as well as industries such as banking, postal services, telecommunications, electricity, hospitals, and schools, for computer bill printing, business printing, office document printing, and post-press processing.