The national treasure grade tea produced in the Indian Ocean island country of Sri Lanka is often given as a state gift to leaders and important figures of various countries. It is manually collected, undergoes精细processing, has a rich flavor, and enjoys extremely high prestige in the international market. The Earl Grey flavor black tea of Yingu Lun has the effects of aromatic qi regulation, stomach strengthening and antiemetic, phlegm resolving and cough relieving. The caramel flavor black tea of Yingu Lun has the effect of reducing internal heat and spleen strengthening.