Soy sauce, commonly known as soy sauce, is mainly brewed from soybeans, wheat, and salt through oil production, fermentation and other processes. The ingredients of soy sauce are relatively complex. In addition to salt, there are also a variety of amino acids, sugars, organic acids, pigments, spices and other ingredients. Mainly salty, but also umami, aroma, etc. It can increase and improve the taste of dishes, and can also add or change the color of dishes. The working people of ancient China had mastered the brewing process thousands of years ago. There are generally two types of soy sauce: dark soy sauce and light soy sauce: light soy sauce is saltier and is used to enhance the freshness; dark soy sauce is lighter and is used to enhance the color.