Shandong Yanggu Constant Crystal Optics, Inc idakhazikitsidwa mu Epulo 2006, yomwe ili ku Xiangguang zone chitukuko chachuma, Yanggu County, Province la Shandong.Ndife apadera pakufufuza, kupanga ndisalingoptics ndi optical zigawo zikuluzikulu.Zogulitsa zathu zazikulu zimaphatikizapo zenera la kuwala, prism, mandala, beamsplitter, fyuluta, wedge, zopanda kanthu ndi zina.