Boil water in a wok or pan. Add crab. Continue boiling for 8 minutes. Transfer the crab and the stock to a clean bowl. Set aside.
Make the roux by melting butter in a wok. Add flour. Constantly stir while cooking for 2 minutes. Pour evaporated milk into the wok. Stir until mixture thickens. Pour the crab stock and stir until the texture of the mixture becomes smooth.
Add Knorr Shrimp Cube. Stir.
Add Crab, mussels, fish, onion, carrot, and celery. Cook for 3 to 5 minutes.
Put the bell pepper, shrimp, and squid into the wok. Stir and cook until the color of the shrimp turns orange.
Season with salt and ground black pepper.
Transfer to a serving bowl. Serve warm. Share and enjoy!