Lotus seeds taste bitter and cold, and have the effects of clearing heat, stopping bleeding and astringent essence. Can be used for treating vexation and thirst, hematemesis and nocturnal emission, red eyes, swelling and pain, etc. The alkaloid Nn-9 contained in lotus seed heart also has a strong antihypertensive effect. And the tea tastes bitter and cool, and has the functions of clearing the head, quenching thirst, resolving phlegm, promoting digestion, diuresis and detoxification. When they are used together, they mainly have the functions of clearing away the heart, calming the liver and detoxifying, so they can make tea together. It's summer, so it's more suitable for drinking.