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HUZHOU JINGSHI FEED ADDITIVE FACTORY was founded in 1998 specialized in the production of zinc sulfate heptahydrate, zinc sulfate monohydrate and indium ingot.

The company holds the registered capital of 5 million RMB and covers an area of 40000 square meters. Now it has the annual production capacity of 35, 000t zinc sulfate of industrial, feed grade and 40t indium ingot, one of the largest manufacturers of zinc sulfate in the world.

Since its foundation, the company is rooted itself at international market and obtained self-support import&export rights in 1999 under the approval of State Foreign Trade Cooperation Ministry. Our products are well sold in China and popular in Europe, America, Oceania, Middle East and other countries and regions.

The company consists of 186 employees, including over 40 technicians and 10 persons engaged in the quality analysis and quality control for every stage of production including raw materials, semifinished products and products. There are equipped with complete experimental facilities in our laboratory, with advanced test method and professional analyst, we carry out 24-hour quality control during the whole production process.

With constant technology renovation and reconstruction, the company initiated the circular production system of "Indium-Zinc" in China, whose processes reach the international advanced level.

The company established strict quality management system according to the ISO9001: 2000 requirements in 2001 and obtained the ISO9001: 2000 certificate on 5th, June, 2002(Certificate No.:J02Q10348ROM).