Hunan Jingshi Group Co., Ltd., is the biggest especial manufacturer of Zinc Sulphate Monohydrate in China, also is the first one manufacturer which got the European FAMI-QS certificate in 2007 for Zinc Sulphate Monohydrate industry with 60000mt production line. So under the ISO 14001 2001, HACCP and FAMI-AS quality management, we assure our product safety and the quality to our customers and the final users.