Tieguanyin is a variety of Chinese oolong tea that originated in the 19th century in Anxi in Fujian province. Tieguanyin produced in different areas of Anxi have different gastronomic characteristics.

Oolong (, ; Chinese: 烏龍茶 is a traditional semi-oxidized Chinese tea produced through a process that includes withering the leaves under strong sun and allowing some oxidation to occur before curling and twisting. Most oolong teas, especially those of fine quality, involve unique tea plant cultivars that are exclusively used for particular varieties. The degree of oxidation, which is controlled by the length of time between picking and final drying, can range from 8% to 85% depending on the variety and production style. Oolong is especially popular in southeastern China and among ethnic Chinese in Southeast Asia, as is the Fujian preparation process known as the gongfu tea ceremony.