Mountain tea has the following two advantages , first, because the cool mountain climate , morning and evening fog, short average sunshine , leading to bitter ingredients contained in tea shoots " catechins " and so reduced, thereby improving the " tea acid " and Sweet ingredients that contribute to the " soluble nitrogen " and so on. Second, due to the large temperature difference between day and night and afternoon clouds obscured the reason for many years , making the tea growing too slowly , so the tea has a soft shoots , leaf thick , pectin content of advantages.