Slice 200g of pork tenderloin into bite-sized pieces.

Prepare 5 bok choy heads by trimming the base and washing thoroughly.

Chop 1/2 onion, 1 green onion, 1 red chili, and 1 green chili into bite-sized pieces.

Mix 2 tbsp soy sauce, 2 tbsp oyster sauce, 2 tbsp cooking wine, 1/2 tbsp sugar, and 1 tbsp sesame oil to create the sauce.

Heat oil in a pan and sauté chopped garlic and green onion until fragrant.

Add pork tenderloin to the pan, season with 2 pinches of salt and 1 pinch of pepper, and cook until browned.

Add onion, red chili, and green chili to the pan and stir-fry together.

Pour the prepared sauce into the pan and mix well to coat all ingredients evenly.

Add bok choy to the pan and stir-fry until wilted.