Beijing Easysweet Bio-Medicine Science and Technology Co., Ltd. is a manufacturer of invitro immune-diagnostic reagents used for colloidal gold one step test in China. We have a professional team of R&D, as well as clean production workshops. Strict quality control, reasonable prices and good service make our products become your best choice. Our main products are fertility tests, infectious disease tests, drugs of abuse tests, tumor marker tests, and sexually transmitted disease tests.