Pu 'er tea: Tea is mild and does not hurt the stomach. Urban life and work are tense, stressful, irregular diet, common stomach diseases and insufficient qi and blood. Pu 'er tea is a good medicine for nourishing stomach and invigorating qi. Caffeine has been fermented in Chen Fang for many years, so it won't get excited after drinking. Empress Dowager Cixi used to drink Pu 'er tea at night. Pu 'er tea has a good degreasing effect, which can reduce triglyceride, cholesterol and blood uric acid in human body to varying degrees. After drinking, it is easy to cause vasodilation, temporary decrease of blood pressure, slow heart rate and decrease of cerebral blood flow, which has a good effect on the elderly and patients with hypertension and arteriosclerosis. What we should pay attention to is the quality of Pu 'er tea itself. No matter what year, it is not suitable as long as there is too much water and too musty. Green tea can reduce fat and lose weight, prevent cancer, resist poison and kill bacteria. Drink green tea in summer and black tea in autumn.