Beef Chow Fun (Beef Ho Fun, 干炒牛河)

Ingredients

• 4 15/16 ounces beef preferably flank/skirt steak
• 1 teaspoon light soy sauce
• 1 teaspoon Shaoxing rice wine
• 1 teaspoon cornstarch
• 1 tablespoon water
• 1 pinch sugar
• 1 teaspoon cooking oil
• 10 1/4 cups ho fun see note 1
• 2 tablespoons cooking oil
• 2 1/8 ounces beansprouts
• 1/4 onion thinly sliced
• 5/8 cup chinese chives see note 2
• 1 tablespoon dark soy sauce
• 1 tablespoon light soy sauce