1. Cut choy sum in 2 inches pieces. Cut chili in strips. Dice ginger and garlic. Peel carrot and shred with grater.
2. Heat the oil, stir fry carrot. Put in garlic, ginger and chili, and season with salt.
3. Stir fry with choy sum. Put in water 1 tablespoon and Shao Xing wine until water evaporate. Open the lid and stir fry. Put in a little sugar. Thicken the sauce with cornstarch water.