Chop up and wash trotter. Scald for 3 minutes, remove and wash.
Soak dried oysters until soft and wash.
Soak black moss until soft, scald and drain.
Wash and blanch Shanghai white cabbage.
Heat wok and add oil. Stir fry ginger until fragrant. Add dried oysters and stir fry until fragrant. Put in trotter, sizzle wine and stir fry for a while. Add 4 cups of water and bring to the boil. Stew over low heat for 2 hours.
Add black moss and seasoning and stew over low heat for 2 hours. Add black moss and seasoning and stew for 10 minutes. Remove and dish up.
Arrange cabbage on the side.