Oyster sauce is a condiment made from oysters. Oyster sauce is a traditional flavor seasoning commonly used in Guangdong, and it is also one of the largest products in sauces. It is made of oyster sauce known as "underwater milk", which is boiled, concentrated and added with auxiliary materials.

Oyster sauce is made of raw oysters, which is a nutritious and delicious condiment. Oyster sauce is not oil, but the soup left over from cooking oyster sauce when processing oyster sauce. This soup is oyster sauce after filtration and concentration. It is a nutritious and delicious condiment.

Oyster sauce is extracted from oysters, and of course it inherits the fragrance of oysters. Many other auxiliary materials are added in the processing process, which forms a unique taste-mellow with a little sweetness. Southern dishes, especially those in coastal areas, seem to have a latent sweetness, and the use of oyster sauce is one of the reasons.

Oyster sauce is made by cooking oyster meat, squeezing juice, concentrating and adding other auxiliary materials. Because Cantonese also call oysters "oysters", they are called "oyster sauce". It is also because of its raw materials oysters and oysters, also known as "underwater milk".