Top grade before rain, treasure before tomorrow. What does rain mean? What does Ming mean?

Longjing tea is a famous green tea in China. Produced in the West Lake area of Hangzhou, Zhejiang Province, it has a history of 1200 years. Longjing tea is green in color, rich in aroma, sweet and refreshing, shaped like a sparrow tongue, and has the characteristics of "green color, strong fragrance, sweet taste and beautiful shape"

Longjing tea can be divided into Shifeng Longjing tea and Meiwu Longjing tea due to different producing areas. There are three kinds of Longjing in West Lake. It first appeared in the Song Dynasty and flourished in the Ming Dynasty. Longjing tea was made before Tomb-Sweeping Day and before Grain Rain, and it was called "before the rain". There is a saying that "it is a top grade before it rains, and a treasure before tomorrow". Longjing tea is brewed, but the buds are upright and the soup is fragrant, especially for those with one bud and one leaf, commonly known as "one flag and one cannon".