Lemon oil has a light and fresh sweet fruit aroma, which has the aroma characteristics of mature lemon peel. It can be used to prepare edible essences such as lemon, cola, banana, pineapple, cherry and melon. It is suggested that the concentration of cold pressed oil should be 6 ~ 25mg/kg and the concentration of distilled oil should be10 ~ 580mg/kg. Illicium verum oil has the characteristics of fennel, licorice and anethole aroma and sweet taste. Mainly used in isolated anethole, used to synthesize anisaldehyde, anisol, anisic acid and its esters; It can also be used to prepare wine, tobacco and edible essence; The concentration in the final flavored food is1~ 230 mg/kg. Osmanthus fragrans extract has the fragrance of natural Osmanthus fragrans, which is used to prepare the essence of Osmanthus fragrans, honey, peach, raspberry, grass green, tea and wine. The concentration in the final flavored food is 0.01~ 0.08 mg/kg.