2. Practice: Cut celery into thin slices, cut beef into 2 cm long slices horizontally, put them in a bowl, add baking soda, soy sauce and pepper, water starch, Shaoxing wine, Jiang Mo and clear water, soak for 10 minute, then add peanut oil and marinate for 1 hour; When the wok is on fire, the peanut oil is burned to 60% heat. Add the beef slices and mix them with a spoon. When the beef is white, pour them into a colander to drain the oil. Leave a little oil in the pot and re-ignite. Add onion and ginger slices, white sugar, soy sauce, monosodium glutamate and water. After boiling, thicken with water starch, add beef slices and celery slices and mix well.