Shanghai Zhiwan Instruments Co.,Ltd. is located in Shanghai, China. We have been specialized in the R&D,manufacturing, sales and service of optical products for many years. We possess a high-tech research team, an elite management and service team and a variety of advanced instruments. Our philosophy: "Be your trustworthy business partner, be always at your service." We pursue unity, integrity, dedication and persistence. A business with strong technical force, high quality products, reasonable price, first-class marketing service would be your best choice!