Step 1

Cut the pork into 3/4-1 in (2-3cm) chunks.

Step 2

Pour the oil into a seasoned wok over a high flame, followed by the ginger and spring onion and stir-fry until you can smell their aromas. Add the pork and stir-fry for a couple of minutes more. Splash in the Shaoxing wine. Add the stock, spices, soy sauce, sugar and 1 tsp salt. Mix well, then transfer to a clay pot or a saucepan with a lid.

Step 3

Bring to a boil, then cover and simmer over a very low flame for at least 1 1/2 hours, preferably two or three. Keep an eye on the pot to make sure it does not boil dry; add a little more stock or hot water if necessary. Adjust the seasoning and add the spring onion greens just before serving.