Gu Yun means "Ancient Atmosphere", and it is Ku Cha's signature Ripe Puerh cake. Coming from Menghai County, Yunnan Province, where the ancient tea mountains are abundant, this tea produces an earthy, yet clean and sweet brew. Fermented Ripe Puerh is famous for its many health benefits such as lowing cholesterol, reducing blood lipid, detoxing, aid with diet and weight loss, etc.