Steam the crabs for 1 and 15 minutes. The specific operation steps are as follows: Step 1: Soak crabs in salt water for a while, and then wash them with clear water, as shown below.

2. Step 2: Wash the mud off the crab with a toothbrush, as shown below.

3. Step 3: Put a proper amount of water into the steamer and put the river crab into the pot, as shown below.

4. The fourth step is steaming 15 minutes, as shown in the figure below.

5. The fifth step is completed, as shown in the figure below.