2. Before steaming the oyster, be sure to wash it, soak it in salt water for more than two hours, and then rinse it after it spits out the sediment, including the sediment on the outer shell and the inside of the oyster, and then scrub the shell surface of the oyster, and finally boil the oyster with boiling water to the opening, then take it out and steam it with seasoning for 6-8 minutes.