1, put tofu in water for later use.
2. After washing the crab and prawn, remove the dirty things such as the intestines and gills of the crab, chop them up with crab pliers and pat them open for later use. The new prawn with a knife can cut off the prawn.
3. Put oil, ginger and heat in the pot, stir-fry the crabs and shrimps, put cooking wine, add water and bring to a boil. Turn the heat down 10 minute.
4. Add tofu and season. Milky soup is produced by oil particles suspended in water, so use oil to make milky soup, such as bone soup or fish, shrimp and crab soup, but the latter one has no oil itself, so stir fry with oil. Before making soup, stir fry until it is slightly burnt, and crab soup is more likely to turn white. You can also add 1.3 flowers of light milk when cooking soup. of course，