Yantai ZK Optics Co., Ltd.,has passed ISO9001:2015 quality management system certification and SGS product testing certification; conducts technical training service, micro-structure analysis and quartz characteristic testing project once a year; invites the professor from the Chinese Building Materials Academy for technical support from time to time.

Adhere to the customer-oriented quality guideline, estabilsh a sound system control program, set strict quality managemengt standards, cultivate a solid sense of quality, and carefully manufacture every product.