Siwei Development Co., Ltd is specializing in production of amino acid serials.

The company covers the area of 70000m2 with chemical engineering workshop,raw material medicine workshop and backward workshop. It is one of the raw material medicine factories with the permit of drugs production distributed by national administrative bureau of food and drug .Presently,our company owns approval text number of nine raw material medicine such as L-Arginine, L-Tyrosine,L-Cystine,L-Cysteine hydrochloride monohydrate,L-Leucine,L-Valine,L-Phenylalanine,L-Lysine monohydrochloride,L-Arginine monohydrochloride.We have obtained the GMP certificate is used by state Food and Drug Administration. 

The products we manufacture meet the standard of CP2005/USP/AJI or related criteria. Our products have been exported many countries worldwide.We will always devote all the sincerity and high quality to our friends and customers.