The steps to make beef tender and smooth are as follows:

1. Select materials. First, choose a piece of fresh beef tenderloin, or you can choose beef tenderloin or beef flakes. The meat is tender and has no fascia, so it is suitable for frying. 2. Cut. Cut the beef tenderloin into thin slices against the grain of the beef. This will cut off the thick fibers of the beef and make the slices more tender. 3. Then gently tap the beef slices with the back of the knife to break the muscle fibers of the beef. This will make the processed beef slices more flavorful and taste better after frying. 4. Put the beef slices into a deep plate, add 2 tablespoons of light soy sauce and a little five-spice powder and mix well. It is like massaging the beef slices to make the meat softer and more flavorful. 5. Then add 20 ml of onion and ginger wine in three batches until the beef slices completely absorb the water. This step not only adds moisture to the beef slices, but also plays a role in removing the fishy smell from the beef. 6. Then add 1 quail egg (or 15 grams of egg white) and continue to mix evenly to make the beef slices wrapped in the egg liquid more tender and smooth. 7. Add 1 tsp of cornstarch and mix well. It will be like putting a coat on the beef slices, forming a protective film to completely lock in the moisture of the beef. 8. Finally add 2 tablespoons of sesame oil (or corn oil), mix well and marinate for 10 minutes. This completes the "sizing" of the beef slices. 9. Wash and cut off the roots of celery, cut into long sections, sprinkle with a little salt, mix well and marinate. This treatment can make the celery sections absorb the flavor in advance. Wash and drain the celery leaves and set aside. Cut the pickled ginger into slices and set aside. Ginger has a crisp and salty taste, and can also play a role in removing fishy smell and improving freshness. 10. Fry. Heat twice as much vegetable oil as usual for stir-frying vegetables in a wok, add 1 tablespoon of Pixian bean paste and stir-fry until the red oil comes out, then add the pickled ginger and stir-fry evenly. 11. As soon as the beef slices change color slightly, add the celery segments and stir-fry quickly for 1 minute. At this time, the beef slices are cooked through and the aroma is diffuse. 12. Sprinkle in a little sugar and stir well to enhance the freshness. Finally, add celery leaves and quickly stir well before serving.