1. The criteria for judging when an oyster is ripe is that the fishy smell is reduced and the color becomes lighter after opening the shell. The best ripe taste is that it tastes very fresh and smooth, without having to chew hard at all, and the fragrance is also good. Not that heavy, the color is light white meat with some slight juice.

2. As long as the shelled oysters are opened, it means that the oysters are ripe, and there is no need to continue steaming. Under normal circumstances, it is enough to boil the water for 1 to 3 minutes. In addition to steaming, oysters can also be boiled. As long as the surface of the shelled oysters is cleaned, they can be placed in clean water and boiled for about three minutes. Bring to a boil, then cook the oysters over high heat. As soon as you see the oysters opening, you can take them out and eat them. It only takes about a minute.