Need. Blanch celery for 1 to 2 minutes, which not only maintains the nutrition of the celery itself, but also allows the celery to cook faster when fried and taste better after frying. Blanching is a cooking method in which ingredients are briefly cooked in boiling water and then fished out. The main purpose of blanching is to remove impurities and off-flavors from the surface of the ingredients, so as to make the ingredients cleaner and more beautiful, and to prepare them for subsequent cooking and to prepare them for subsequent cooking. At the same time, blanching can also make the ingredients more tender, easy to cook, improve the efficiency of cooking, blanching applies to a variety of ingredients, especially vegetables, meat and seafood, etc., blanching time is generally 10 seconds to 1 minute, the specific time according to the types and sizes of ingredients to decide, too long or too short may affect the cooking effect.