Chaoshan is located in the southeastern part of Guangdong Province, with a variety of fruits in all seasons, and is famous as the "town of cold fruits", among which the most famous cold fruits are the "three treasures of Chaoshan", namely the old tangerine, the old fragrant yellow, and the yellow skinned black beans.

The Chaoshan region has a rich culinary culture, and most of the food is light and nourishing. The "Three Treasures of Teochew" is the concentration of the people of Teochew for healthy diet, they are all medicinal cuisine, with high medicinal value, in which the old medicine orange is one of the most difficult to shake the position in the cold fruit.

The old medicine tangerine adopts the local good kumquat as the raw material, with licorice, salt and honey as the auxiliary material for pickling. The kumquat itself is sweet and sour, and quenches thirst. After the traditional ancient method of boiling process production, repeated nine steam nine sun, and finally tank storage aged stored into the old medicine tangerine