1- Put the fresh leaves evenly on the bamboo reed fence or on the sunshine green Cheng, use the sunlight to irradiate the heat and blow the wind to wither and evaporate part of the water of the fresh leaves. First of all, the free water in the cell space, most through the stomata, a small amount of evaporation through the horny layer, the leaf texture becomes soft, suitable for shaking the green. 2-under the action of light and heat, the cell fluid flow, concentration increases, and a series of chemical changes begin.

3. Leaf temperature rises. Part of the low-boiling aromatic substances volatilized, chlorophyll in the light and the role of enzymes, began to decompose and disappear, fresh leaf chlorophyll accounted for 0.062% of the dry matter, 0.061% after the sun green.