Beijing Qingfengkanghua Technology Co., Ltd. is a comprehensive hi-tech enterprise which combines the production, R&D, inquiry and technical-service. our company have unique advantages as following:1 the staff including 3 experienced doctors graduated from Tsinghua university .2 our products only focused on markets of quality-required,namely ,products with neither bad quality nor extreme cheap price would be sold from our company.3 by the same quality and specification,our products have better reasonable prices comparing with foreign...