Beijing W&F Technology Co., Ltd. is registered in Beijing, the capital of China, was established in 2006 and has been in continuous operation for 17 years.

? Guangzhou Rontto Trading Co., Ltd. Specializes in production and sales: Nickel-cadmium rechargeable battery, nickel-metal hydride rechargeable battery, disposable dry battery, power bank, lithium ion battery, lithium polymer battery, notebook battery, battery charger, injection molding wire and other products, in strict accordance with the ISO9001: 2015 quality management system certification standard organization production and quality control, the company's products are widely used in: Wireless telephone, intercom, power tools, electric toys, emergency lights, flashlights, lawn lights, medical equipment, instruments and meters, resource exploration, household appliances, high-power lighting, outdoor mobile power supply and other fields.

Green Optoelectronics Communication Co., Ltd. is one of the most professional companies specializing in the field of communication instruments and electrical appliances in China, we are offering state-of-the-art & cost effective products and solutions to the global customers in more than 40 countries.

Shenzhen Hontek Co., Ltd. is a professional international sales company for telecom test equipments. We are the agent of comway, fujikura, sumitomo, exfo, jdsu, anritsu products. At the same time, we have our own factory producing the fiber tester and fiber accessories.

Qingdao Sunet Technologies Co., Ltd (SUNET), estalished in 2006 Year(which located in beatiful city QINGDAO, Shandong Province), is a high-tech enterprise and a leading worldwide provider for Fiber Optic Components.

Shenzhen Ouliyang Technology Co., Ltd. is specializing in the research and development, production and sales of new green energy products and lithium battery pack for more than 10 years. The company founder started it with a vision, a vision that wants to give the world new energy, and wanted to make an impact and give wings to their dreams and passions. Till now, Ouliyang products involve portable power station, flexible solar panel, home energy storage system, deep cycle lithium iron phosphate battery pack, replacement drone battery pack, medical battery, two way radio battery and other lithium battery pack that's widely used in ebike, scooter, PDA, POS devices, etc. With the effort of the Ouliyang team work, the company has got UN38.3, MSDS, CE, FCC certificates for the most of products already and build a long term relationship with the clients from the worldwide and get a good reputation from the clients.

We, Techwin (China) Industry Co., Ltd was established in 1998, focusing on Cable and Antenna Analyzer, Vector Signal Generator, Synthesized Signal Generators, Vector Network Analyzer, Spectrum Analyzer, Fusion Splicer, OTDR, Optical Fiber Cable, PLC Splitter, Fiber Coupler, Fiber Cable Identifier, Optical Fiber Power Meter, Fiber Light Source, Optical Fiber Ranger, Optical Fiber Identifier, Visual Fault Locator, Optical Fiber Talk Set, PON Power Meter, Optical Variable Attenuator, Optical Tool Kit etc. Our products and Service are exported to worldwide(More than 60 Countries and Regions) and we create USD10, 000, 000 for our annual sales.

Qingdao Sunet Technologies Co., Ltd (SUNET), is a high-tech enterprise and a leading worldwide provider for Fiber Optic Components and FTTH products. We have our own factory.