Begin by preparing the bitter melon. Cut off the ends and halve it lengthwise. Use a spoon to remove the seeds from the inside. Then, halve each half lengthwise into two pieces. Finally, slice the pieces diagonally into thin slices, with the skin side facing up, at a roughly 45-degree angle.
Slice the pork into thin slices. Then, marinate the pork slices with cooking wine, salt, light soy sauce, and cornstarch, giving them a thorough massage to ensure they are evenly coated. Allow the pork to marinate for 10 minutes.
Meanwhile, bring a pot of water to a boil and add the blanching ingredients: cooking oil and salt. Blanch the bitter melon slices for 30 seconds, then remove them and set aside.
In a small bowl, mix together the ingredients for the stir-fry sauce: light soy sauce, oyster sauce, sugar, and cornstarch slurry. Stir until well combined, and set aside for later use.
Heat oil in a pan over high heat. Add the marinated pork slices and stir-fry until they are 70% cooked.
Add the minced garlic and fermented black beans to the pan, stirring until fragrant.
Now, add the blanched bitter melon slices to the pan, followed by pouring in the prepared stir-fry sauce.
Stir-fry everything together over high heat until the bitter melon slices are evenly coated and cooked through.
Once everything is cooked and well combined, remove from heat and transfer to a serving dish.