Grade III: amino acid nitrogen ≥ .4g/1ml, total nitrogen ≥ .7g/1ml. Soy sauce is divided into different grades. The premium grade of soy sauce represents the grade of soy sauce, and the gold label is the name of soy sauce products. For example, Changkang Jinbiao soy sauce belongs to soy sauce, which is a very good product of Changkang and belongs to the first-class soy sauce.