This premium tea combination contains High Mountain Oolong Tea and Native Tea leaves from Taiwan. High mountain tea is Oolong tea cultivated at least 1,000 meters (3,300 feet) above sea level. This special tea is lightly fermented (semi-oxidized) above this altitude which gives the tea a high aroma and shine property. Natural tea leaves from Alishan located 1500 meters above sea level in Taiwan are produced using the same technique for over two decades preserving the taste. Mr. Chien is committed to sustainable farming and to carry on the traditions.