Ningbo Guoguang Biotechnology Co., Ltd is a production-oriented enterprises specialized in producing food additives and nutrition enhancer, medical intermediate product. It is located in Cicheng, Ningbo City, Zhejiang Province. We have a number of professional and technical personnel engaged in the type of amino acid products research and development. Now, we mainly produce L-citrulline, L-citrulline-D, L-malic acid (2:1) (1:1), L-tryptophan, L-...