Chaozhou Sanhuan (Group) Co., Ltd. was established in 1970 and listed on the Shenzhen Stock Exchange in 2014 (stock code: 300408). It is a national 863 achievement industrialization base and a national high-tech enterprise. It has been ranked among the top ten of China's top 100 electronic components for many years and ranked eighth in 2016. Sanhuan Group integrates the research and development and manufacturing of materials, products and equipment. Its products cover application fields such as optical communications, electronics, electrical engineering, machinery, energy conservation and environmental protection, new energy, biology and fashion. Among them, the production and sales of optical fiber connector ceramic ferrules, alumina ceramic substrates, and ceramic substrates for resistors are among the best in the world.