1. First, put the crab into the pot, and put the clear water that can cover the crab, as shown in the following figure:

2. Then slice the ginger, as shown in the following figure:

3. Put the ginger slices and crabs into the pot and sprinkle with a spoonful of salt, as shown in the following figure:

4. After that, you can cover the pot and cook over high heat, as shown below:

5. After the water is completely boiled, turn to low heat and continue to cook for 5 minutes, as shown below:

6. Finally, drain and serve, as shown below: