How about Donghui Glasses Factory?

All right. According to the investigation of official website, Donghui Optical Factory is a scientific and technological enterprise specializing in the processing of optical communication crystals and optical products, and its products are widely used in optical communication, optical network, data exchange and other fields. The company has passed the SGS-certified ISO 900 1: 20 15 quality system certification and SGS-certified ISO14001:2015 environmental management system certification, and has developed and manufactured optical precision machining technology, optical precision coating technology, optical device packaging and testing technology, and micro-.