Eupatorium odoratum, lotus leaf, bamboo shavings and orange peel are each 10g, and the ratio of boiling water to drinking is1:1. Perrin is fragrant and dry, invigorating the spleen and appetizing; Bamboo shavings clear away heat and resolve phlegm; Lotus leaves clear away heat and relieve summer heat; Orange peel is dry and wet. The combination of four kinds of medicinal materials and soaking in water as a tea substitute has certain effect on improving damp-heat in the body, and it can take effect in one week. Note that taking cassia seed for a long time is easy to hurt the stomach. This kind of tea can't be drunk for a long time, and it's better not to exceed 3 months.