Lotus seeds, dried tangerine peel, figs and yam can all be boiled. Figs are rich in amino acids, with fresh fruits accounting for 1.0% and dried fruits accounting for 5.3%. At present, it has been found that 18 amino acids have high utilization value because they all contain 8 amino acids necessary for human body, among which aspartic acid (1.9% dry weight) has the highest content, which has a good effect on fighting leukemia, restoring physical strength and eliminating fatigue. Ficus carica beverage is used as a substitute for caffeine abroad.