Linzhang County Sihai Carbon Co., Ltd., founded in 2003, is located in linzhang Carbon Industrial Zone, North Carbon Base of Handan City. It is located at the intersection of the four provinces of Yunnan, Henan, Shanxi and Shandong. It is close to National Highway 107 and Beijing-Guangzhou Railway. Convenient transportation. It is a privately-owned, comprehensive carbon producer with an annual output of more than 20, 000 tons of graphite carbon products. The main products are ordinary graphite electrodes, high-power graphite electrodes and ultra-high power graphite electrodes; And various specifications of carbon electrodes, as well as graphite crucibles, graphite rotors, graphite plates, graphite square, and other graphite products, special graphite.

At present, the total assets of the four seas of carbon are 100 million yuan, and there are more than 100 employees. The four seas have maintained healthy, stable and rapid growth. The average growth rate in 2008 was 30%, and the average growth rate in 2015-2018 was 50% (from 5 million in 2007 to 80 million in 2017). In 2018, the sales income was 40 million yuan, of which 10 million yuan was earned through exports, an increase of more than 60% over the same period of last year. After more than ten years of continuous adjustment, development and expansion, Sihai has become a large-scale comprehensive modern enterprise mainly based on graphite electrodes. It is one of the largest graphite production and export bases in China.