The processing of green tea is simply divided into three steps: enzyme fixation, rolling and drying, among which the key is enzyme fixation. Fresh leaves are inactivated by enzyme activity, and the chemical components contained in them are basically unaffected by enzymes, and change through heat, thus forming the quality characteristics of green tea.
Immobilization plays a decisive role in the quality of green tea. Through high temperature, the characteristics of enzymes in fresh leaves are destroyed, the oxidation of polyphenols is stopped, and the leaves are prevented from turning red; At the same time, some water in the leaves is evaporated, which makes the leaves soft and creates conditions for kneading and shaping. With the evaporation of water, the low-boiling aromatic substances in fresh leaves evaporate and disappear, thus improving the aroma of tea.
Due to the different mechanical or artificial forces in the drying process, the finished tea forms different shapes such as long strip, round bead, flat fan, needle and spiral, so it is divided into long fried green, round fried green and flat fried green.