Tie Guanyin is a representatives of oolong tea, and belongs to green tea among the six major types of tea. Tie Guanyin was originally the name of a tea tree, because it is suitable for making oolong tea, its product was thus named Tie Guanyin; the so-called Tie Guanyin is actually the oolong tea made from Tie Guanyin tea tree.茶叶的广告茶叶转化