Marinate sliced pork with soy sauce and flour for 10 minutes.

Heat oil in a pan, stir-fry pork until cooked, then transfer to a plate.

In the same pan, add more oil if needed. Sauté garlic and ginger until golden brown.

Add long beans and mushrooms, stir-fry until half cooked.

Return pork to the pan, season with chicken powder, and mix well.