Prepare the Chinese Broccoli: Trim off any tough ends from the Chinese broccoli and cut the stalks into two-inch pieces at a diagonal.
Parboil the Stalks: Boil 8 cups of water in a wok, add 1-2 tablespoons of oil and 1 teaspoon of salt. Add the stalk pieces of Chinese broccoli and cook for 1-2 minutes with the lid on.
Add the Leaves: Add the rest of the Chinese broccoli and cook for another minute before draining.
Stir-Fry: Heat up a clean wok with some oil. Stir-fry two cloves of minced garlic on high heat. Add the drained gai lan, season with half a teaspoon of salt, 1 tablespoon of sugar, and 1-2 tablespoons of light soy sauce. Optionally add a little cornstarch for thickening.
Serve: Give everything a good stir before plating and serving.