Bring the ribs to a boil with water, salt, sugar, 2 chillies, 100 g ginger and 200 g spring onions in a saucepan, then simmer over medium heat until the meat almost falls off the bone. Remove the ribs and let them cool.
Heat the vegetable oil in a saucepan to 160 degrees and fry the ribs in it for 4 minutes. Heat palm sugar, Thai chilli, soy sauce and oyster sauce in a pan and stir, then glaze the ribs with it. Sprinkle each with 1 tablespoon of spring onions and 1 teaspoon of ginger and add half a lime each to season.