Tie Guanyin is a representative 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.

Tie Guanyin has the excellent quality, its leaves ale thick and solid, it weighs as iron with dark and moist color, it has an obvious sand green color with bright-colored red points.

Its fragrance is noble-minded, long-lasting, strong, and fresh, it has a unique"lingering charm" with a sweet and fragrant aftertaste; even after 7 times infusion it still has fragrance…it can be called the king of oolong tea.