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GRT(Beijing Guangruntong Technology Development Co., Ltd.) is headquartered in Beijing Zhongguancun Hi-Tech Park and began in April 2008. GRT has gathered a group of senior R&D personnel with an average age of more than 15 years. Under the background of the rapid development of the optical fiber industry and the optical fiber to households, GRT has always adhered to the strategic principles of quality and innovation, and has gradually grown into a high-tech fiber optic company that is currently well-known in China, which integrates R&D, production and marketing, and has its own intellectual property and its own brand.
The main products of GRT are Optical Fiber Network Cards, Optical Fiber Modules, WDM devices, Optical Converter, Optical Fiber Patch Cord, and Optical Splitter. All kinds of products have passed international certification such as FCC, CE, and ROHS, as well as national industry certification, and have won a number of scientific and technological progress awards and excellent product awards. On the road ahead, GRT is committed to building China's own national enterprises, achieving the goals of "Optics Links The World, Connects Us Togetcher".

Our mission is:
Continuous dynamic growth by offering our business partners high quality solutions, know-how and products in a quicker as well as a more effective and economical way than our competition.
We always try to abide by the following principles:
Our products and services
Quality products and solutions are our passion. We want anything leaving our company to be innovative, elaborate and executed according to the assumption. Furthermore, we would also like our passion to be visible in all that we do.
Our partners
We call our customers and suppliers partners mainly because they are our closest cooperatives on the road to success and creation of a good company image. We owe them a lot and through the quality of our services and competitiveness of our offer we would like to compensate for their trust.
Our employees
We are our employees and we are not only a company, we are, above all, people. We are also working towards our own success.
Our surroundings
All our locations are part of a street, city or region. We understand our influence on society and the environment, which is why we do our best to build a strong relation with our surroundings and care for their values and uniqueness.

engionic Fiber Optics GmbH has been designing and manufacturing tailor-made fiber optic light guide solutions and fiber optic sensors for more than three decades. The customer-specific products are used, among other things, in power plant monitoring, medical technology and industrial process monitoring.
The added value for our customers lies in the consistent support, starting with the development of the prototypes, to the start-up of the series production and then to the continuous optimization of the products and the manufacturing costs.
engionic Fiber Optics, thanks to its many years of experience, has been perfectly aligned to the needs of industrial customers who integrate the fiber optic components into their overall solutions. Product traceability, quality management and delivery reliability are part of the corporate DNA.
engionic Fiber Optics GmbH is part of the engionic Group.