2. Practice: Put all the materials into the teapot, rush into boiling water and simmer for ten minutes.

Cassia seed can improve eyesight, lower blood pressure, lower blood fat and treat constipation. Chrysanthemum can clear liver and improve eyesight; Osmanthus fragrans has the functions of whitening the skin, eliminating toxins in the body, relieving cough and resolving phlegm, preserving health and moistening the lungs.