Free Fly Co. Ltd is a hi-tech company which is specialized in photology, mechanics and electric field. It has 386 employees,4 scientists and over 150 different technicians inside. It's main products are police traffic radar, air quality auto-insight monitor system(doas)and continuous emission monitoring system of flue gas(cems)etc. And the company has complete system of research, produce, sale and service. Also it has passed the quality control system of iso9001.