Yingkou Hongwei Magnesium Sulphate Fertilizer Chemical Co., Ltd. (Yingkou Hongwei Agricultural Science and Technology Development Co., Ltd.) is a joint-stock company mainly engaged in the deep processing of mineral products and international trade. The company's headquarters is located in Shiqiao City, the "Magnesia City of China". The company has formed an integrated operation from mining, sintering, processing, chemical production, transportation, warehousing, port shipping and import and export trade. The leading products of the company are magnesium fertilizer product series and magnesium oxide product series, which have formed an annual production capacity of nearly 100000 tons of various products.