2, soup know-how: you must use a larger volume of casserole (potbelly small mouth best), once the water is no longer add water, medium heat after boiling, with a small fire or micro-fire pot for more than two hours, and only casserole can be boiled out of the unique flavor. Casserole is the soup "edge". Should put in enough ginger. Ginger is the "soul" of soup. Fresh meat must be used, and must contain a small amount of fat. This is the "quality" of soup. One or two things must be put to clear heat, promote dampness and strengthen the spleen, such as lotus root, lily, watercress, horseshoes, yam, radish and so on. This is the "essence" of soup. Must put one or two sweet things, such as a few red dates, jujube, a small amount of raisins or dried cinnamon. Another depending on the different needs to add American ginseng, astragalus, wolfberry, angelica and so on. This is the soup of the "gas". Appropriate to add one or two stems, mushrooms and dried fruits, such as king trumpet, yellow flowers, mushrooms, black and white fungus, peanuts, white fruit, lotus seeds and so on. This is the soup "partner".