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siwei development group ltd. is a reputed professional enterprise in china dedicated to the amino acids production and sales of fine chemical products.over the years we have been making meticulous efforts in the production, research and development of new generation chemicals applied in a variety of industries like amino acids, food additive, pharma grade raw materials and so on. with many years industry experience, siwei is one of the amino acids suppliers and exporters in china, serving bulk powder to industries like dietary supplement, nutritional supplement, functional food and drink.health is more valuable than wealth. in the tenet of concern for human's life quality. siwei devotes itself to manufacturing amino acids, which are the necessities for human health.