Heat a little oil in a wok over high heat and stir-fry the pork in batches until completely golden. Remove and set aside
Lower the heat and add the shallots, ginger, and chili. Sauté over low heat for a few minutes until the vegetables soften
Add the sugar, fish sauce, soy sauce, and 200 ml of water as well as the coconut milk to the wok and mix everything together. Bring to a boil while stirring to dissolve the sugar. After 5 minutes, add the spring onions.
Return the pork to the pot. Boil vigorously over high heat for 8 to 10 minutes until the sauce thickens to coat the meat well and becomes shiny.
Taste and add a bit more fish sauce if necessary
Notes
You can leave the meat inside throughout the entire process but you run the risk of it becoming tough