1. Scrub the shell of the blue crab.
2. Peel the crab shells, remove the sandbags and gill leaves, and clean them.
3. Cut it into small pieces.
4. Dip the cross-section of the crab meat with custard powder [starch is also OK].
5. Shake off excess powder.
6. Put it in the frying pan and fry it.
7. Take the rice cake out of the pot.
8. Put a little salad oil in a pot and heat up, add green onion, ginger, garlic slices and stir fragrant.
9. Add hoisin sauce, chili sauce, and oyster sauce and stir for a while.
10. Add two spoons of water, add the fried crab cubes and rice cakes.
11. Stir fry to collect juice.
12. When the soup is thick, take it out of the pot and serve it on a plate.
