Steps for making stir-fried beef：Slice the beef. Add salt, soy sauce, starch, and oil, and mix well. Shredded ginger, small chili peppers. Heat oil in a wok, and put the celery into the wok to stir-fry. Add an appropriate amount of salt and stir-fry until just cooked, then remove and set aside. After cleaning the wok, heat oil again and stir-fry the shredded ginger until fragrant. Add the beef to the wok. Stir-fry until it changes color, then add the small chili peppers. Pour in the celery and stir-fry. Finally, add oyster sauce for seasoning and it is ready to serve.