Yuzu is a citrus fruit and plant in the family Rutaceae of East Asian origin. Yuzu has been cultivated mainly in East Asia, though it has also recently been grown in New Zealand, Australia, Spain, Italy, and France.

Cheong is a name for various sweetened foods in the form of syrups, marmalades, and fruit preserves. In Korean cuisine, cheong is used as a tea base, as a honey-or-sugar-substitute in cooking, as a condiment, and also as an alternative medicine to treat the common cold and other minor illnesses.