The kumquat (Latin scientific name: Fortunella margarita (Lour.) Swingle), is a plant under the Kumquat family Rutaceae, also known as golden date, Kumquat, small orange. Originally distributed in the southeast coastal provinces of China, especially in Guangdong area, the planting and eating Kumquat has the longest history, is truly the hometown of Kumquat. In addition, South China and the middle and lower reaches of the Yangtze River are also widely cultivated.