Winsun Technology, located in Shenzhen, Our Shenzhen and HK branch offices are focus on electronic components buying and trading, Our market is all over the world.

SJK founder in 1989, is a manufacturing-type enterprise of frquency control products. It owns independent brand SJK and complete product line including small SMD crystal resonator, SMD crystal oscillator, traditional DIP crystal resonator and crystal oscillator, high-end oscillator (including crystal oscillator, VCXO, TCXO, OCXO, VC-TCXO, LVDS /PECL output), SAW device, crystal filter(MCF), ceramic resonator, crystal filter and other frequency control products.

Fronter Electronics Co., Ltd. is a professional manufacturer of Quartz Crystal Electronic Components inChina, which specializes in researching & developing, producing and marketing.

ChipSun Technology Co., Ltd. Founded in 1991, is dedicated to the research and development, production and sales of frequency components. We made our own brand FT which was recognized as National High-Tech Enterprise in 2017.

Established in 1998, Shanghai Jingding Electronics Co., Ltd. (JDS), a high-tech joint-stock enterprise specialized in development and manufacture of quartz crystals, is one of the largest domestic manufacturers of quartz crystal resonators and quartz crystal oscillators. JDS has an R&D center in Taiwan and a production base in Mainland China, covering a plant area of 35, 000sqm. With 3, 000sqm of standard intelligent office space, the Company currently owns 850 employees, including nearly 200 technicians. Possessed of advanced production and test equipment which has been imported from South Korea, Japan, and the United States successively, experienced technical specialists, as well as solid technologies and abundant experience in product research and development, the Company has achieved an annual production capacity of 50 million HC-49S crystal units, 35 million SMD crystal resonators, and 30 million various oscillators.

ROSON ELECTRONICS CO., LTD founded in 1994. Over 10 years efforts and technology accumulation, ROSON has grown a professional manufacturer of frequency products. Nowadays, Roson's product line includes crystal resonators, oscillators, filters and ceramic resonators, filters, discriminators, traps, can offer through hole and SMD type product.