Oyster sauce is a condiment made from oysters (牡蛎). Oyster sauce is a traditional flavor seasoning commonly used in Guangdong, and is also one of the largest products in the sauce category. It is made from oyster sauce, known as "underwater milk", which is boiled, concentrated and refined by adding auxiliary ingredients.

Oyster sauce is made from raw oysters and is a nutritious, flavorful condiment. Oyster sauce is not oil, it is the soup left over from boiling oyster sauce when processing oyster sauce. This soup is filtered and concentrated to make oyster sauce. It is a nutritious and flavorful condiment.

Oyster sauce is extracted from oysters, of course, inherited the flavor of oysters, in the processing of adding many other auxiliary ingredients, it formed a unique flavor - mellow with a little sweetness. Southern dishes, especially those from coastal areas, seem to have a latent sweetness, and the use of oyster sauce is one of the reasons why.

Oyster sauce is made by boiling oyster meat, squeezing the juice, concentrating it, and adding other auxiliary ingredients. It is called "oyster sauce" because the Cantonese also call oysters "raw oysters". Also because of its raw material oysters and oysters, also known as "underwater milk".