Heat Oil Until Smoking In A Wok Or Large Skillet Over High Heat. Stir-Fry The Onion For 1 Minute, Then Add The Ginger And Garlic, And Cook For 30 Seconds More. Stir In The Pork And Cook For 2 Minutes Until Browned. Then Stir In The Mushrooms And Carrot; Cook Another Two Minutes. Stir Together The Soy Sauce, Rice Wine, Sugar, And Cornstarch In A Small Bowl. Pour Into Stir-Fry, And Bring To A Boil. Cook For 30 Seconds Until The Sauce Has Thickened, And Has Turned Clear. Remove From The Heat And Transfer To A Serving Dish.