28.01.2015 · Health Benefits of Ti Kuan Yin Tea. Tie guan yin oolong tea yields. harvested by hand from high altitude tea orchards and is the oolong tea of.Tie Guan Yin is a premium variety of Chinese oolong tea and is well known. High grade Tie Guan Yin is made from. The Tie Guan Yin tea plant is known as.Lao Tie Guan Yin is a very rare, expensive and high. The evidence of Lao Tie Guan Yin’s aging process can be. Номе » Oolong Tea » Lao Tie Guan Yin ‘Aged.