Shijiazhuang Haitian Fine Chemicals CO.,Ltd which is a leading manufacturer of amino acids for food grade and pharmaceutical grade .And we have three production lines: the first line produces:Glycine,L-Threonine,L-Tryptophan,DL-Methionine,L-LysineHCL,DL-Alanine ; The second line produces:L-Methionine ;The third line produces: L-Hydroxyproline and L-Proline