Longjing tea is a famous green tea in China. Produced in the West Lake area of Hangzhou, Zhejiang Province, it has a history of more than 1,200 years. Longjing tea has emerald green colour, rich aroma, sweet and refreshing, and is shaped like a sparrow’s tongue, that is, it has the characteristics of “green color, fragrant, sweet taste and beautiful shape”. Qing Dynasty tea master Lu Cizhi once praised the West Lake Longjing: “Sweet and fragrant like an orchid, secluded but not cold, indifferent in sipping, seemingly tasteless, but after drinking, the feeling of harmony pervades the teeth, this tasteless taste is the best taste.” “After drinking this cup of Longjing, you haven’t missed the spring in Jiangnan!