Shanghai Sigma Hi-Tech Co., Ltd (SIGMA) was founded in 1992, located in Block D of Everbright Convention & Exhibition Center, No.80 Caobao Road, Shanghai, China, and is the first registered UV phototherapy medical device company in China. With the tenet of "developing photomedicine technology and serving human health", SIGMA devotes itself to the research and development of medical devices in the field of photomedicine. Adhering to the principles of safety, reliability and effectiveness of medical devices, SIGMA has set up a high-standard production and quality assurance system, and transformed effective photomedicine methods into products by means of technology. products. Sigma has been awarded "Shanghai High-tech Enterprise" for seven consecutive years since 2001, and the self-developed 03 and 05 UV phototherapy instruments have been recognized as "2002 Shanghai Grade A High-tech Achievement Transformation Project". In August 2011, Sigma was awarded by Philips as a five-star strategic partner for Philips' special light source UV medical light source OEM. The UV phototherapy instruments produced by Sigma have been applied in more than one thousand medical institutions, such as: Huashan Hospital of Fudan University, Institute of Dermatology of Chinese Academy of Medical Sciences, the First Affiliated Hospital of North University of Medical Sciences, the First Affiliated Hospital of China Medical University, the Seventh Affiliated Hospital of Shenyang, Xijing Hospital, the First Affiliated Hospital of Wuhan, the People's Hospital of Hubei, the People's Hospital of Heilongjiang, the Second Affiliated Hospital of Zhemdan University, the Third Affiliated Hospital of Hangzhou, Xiangya Hospital of Hunan Province, the Peking Union Medical College of Wuhan At the same time, Sigma combined with the market demand, and then launched the software system for ultraviolet phototherapy centers, "phototherapy center operation control information communication system", to improve the management of phototherapy centers and the use of efficiency to provide a good Sigma as a strategic partner of Philips China, adhere to the casting of professional quality, to build a leading brand strategy. Strategy