cological environment, this area is recognized by the world tea experts as the best place for the growing of dark tea, therefore it is only in Hunan that top-quality dark tea is produced. Chinas first brick dark tea, first Fu brick tea, first Flower brick tea and first Qianliang tea were all born in Hunan. It is well known: Only China has dark tea in the world, only Hunan has dark tea in China, Hunan dark tea is exclusive in the world, Hunan dark tea is the most valuable in the world.