Soy sauce. Soy sauce is made from soybeans or black beans, wheat or flour as the main raw material, artificial access to the seeds of the song, through the natural exposure to the sun, fermentation, light color and reddish brown. Soy sauce is used for cooking and has a salty flavor. Soy sauce is mainly used for seasoning and is light in color, so it is often used in stir-fry or cold dishes. Therefore, soy sauce is not vinegar, but a kind of soy sauce.