There is no used oil, only oyster sauce.

Oyster sauce is a seasoning made from oysters. Oyster sauce is a traditional seasoning commonly used in Guangdong, but also one of the largest products in the sauce category, known as the "seabed milk" called oyster oysters as a raw material, boiled and concentrated juice, plus auxiliary materials refined. Oyster sauce has a delicious flavor, rich oyster aroma and moderate consistency, and is also the main ingredient in traditional Cantonese dishes such as beef with oyster sauce and fresh mushrooms, vegetables with oyster sauce, and noodles with oyster sauce.

Expanded Information

Oyster sauce and soy sauce are both seasonings, but the raw materials used in their processing are fundamentally different, oyster sauce is a condiment made from oysters as the main raw material, which has a delicious flavor and a strong oyster aroma, whereas soy sauce is a kind of condiment made from soybeans or wheat as the main raw material after fermentation and processing. It is not as nutritious as oyster sauce.

Oyster sauce and soy sauce flavor is very different, oyster sauce has a natural oyster flavor breath, and soy sauce is more soy-based, some poor quality soy sauce can not even smell the soybean flavor, there is a sweet smell, in addition to oyster sauce quality is more thick, a more dilute paste, and soy sauce is a simple liquid.