Guanyin King is the best oolong tea. Its quality characteristics are: tea sticks are curled, fat and round, heavy and even, sandy green in color, and the overall shape resembles a dragonfly head, a spiral body, and a frog's legs. After brewing, the soup is golden and rich like amber, with a natural and fragrant orchid fragrance. The taste is mellow and sweet, with a long aftertaste. It is commonly known as "yinyun". Tieguanyin tea has a high and long-lasting fragrance, which can be said to be "the fragrance remains after seven brews".

In order to standardize tea names and protect geographical certification trademarks, the Anxi County Government has expressly stipulated that the use of product names such as "King Guanyin" that are confusing with the Tieguanyin certification trademark is prohibited.