Choosing oyster sauce depends first on the luster of the product. The high-quality oyster sauce has a bright luster and does not make it black. Secondly, we should taste its freshness. One of the major functions of oyster sauce is to refresh it, so umami is the most important.

Guangdong calls oysters oysters, and oyster sauce is a seasoning made from oysters. Oyster sauce is a traditional umami flavor seasoning commonly used in Guangdong, and it is also one of the largest products of sauce. It is made from oyster, which is known as "undersea milk", by cooking, concentrating the juice and adding auxiliary materials. Oyster sauce is delicious, rich in oyster flavor, moderately thick and high in nutritional value. It is also the main ingredient for preparing traditional Cantonese dishes such as fresh mushroom beef, green vegetables in oyster sauce and oyster sauce noodles.