Soybean sauce, also known as yellow bean sauce, is made by fermenting ground and crushed fried soybeans, which is a traditional Chinese condiment.Yellow bean sauce has a rich aroma of soy and esters, with moderate saltiness and sweetness. It can be used in various dishes and is one of the ingredients for making Beijing-style noodles ( ).High-quality yellow bean sauce usually appears reddish-brown or brownish-red, with bright color and proper viscosity, fresh and rich flavor, moderate saltiness and sweetness, no off-flavors or impurities.