According to the query of Flower Encyclopedia, the small oranges that can be eaten together with the skin are called kumquat or kumquat. This kind of orange is very small, even smaller than table tennis. Kumquat tastes sour and sweet, and tastes refreshing.
Kumquat is warm and humid, afraid of waterlogging and light, but afraid of strong light, slightly cold-resistant and drought-tolerant, and is planted in both north and south. It needs neutral culture soil rich in humus, loose and fertile, and well drained. If the soil is acidic, it will not grow well.