... natural fermentation;,2,Raw material: the non-GMO soybean and wheat; No preservatives,3,Level: amino acid nitrogen content ... the ISO9001, HACCP and QS system authentication.Secondly :Color and lustre and posture1,Mahogany: the amino acid and sugar maillard reaction happens naturally ... esters, ketones, fresh sweet amino acids, a small amount of sugar and so on , combined with fresh, salty, sour, sweet, ...