soy sauce is mainly by the soybean sauce, starch, wheat, salt, oil through the system, brewed from fermented and other procedures. The components of soy sauce is complex, not only salt, but a variety of amino acids, sugars, organic acids, colorings and Spices .With salt-based,there are also some flavor, aroma, etc. It can increase and improve the taste of dishes, but also to add or change the color of dishes.