In nature tea alpine oolong jie guan yin 50gjie guan yin is produced in the fjin province of china and is a partly fermented tea which is very well known as one of the famous teas of china a favourite of tea lovers with its fresh mountain feel a true taste of nature in its purest form the tea brews to a pale yellow colour and produces a beautifully sweet floral natural taste and aroma which is unparalleled