China Electronic System Engineering No.4 Construction Co., Ltd. (hereinafter referred to as CLP No.4 Company) is one of the earliest engineering companies specializing in mechanical and electrical equipment installation in China. It has the first-class qualification of electromechanical installation engineering general contracting, housing construction engineering general contracting, petrochemical engineering general contracting, fire protection facilities engineering, electromechanical equipment installation engineering, building intelligent engineering, electronic engineering and building intelligent first-class special design qualification issued by the Ministry of Construction. Electronic communication, radio and television industry, electronic engineering, microelectronic products (integrated circuit production process) and electronic special environmental engineering (special environmental technology), class B design qualification, environmental engineering design qualification.
1997 obtained the ISO9002 international quality system certification. It is a member of China Installation Association, Clean Technology Branch of China Electronics Society and Electromagnetic Compatibility Committee of Microwave Branch of China Electronics Society.