Orange: the fruit is round to rectangular, orange-yellow, and the oil cells are raised, which is not easy to peel. No bitterness. The stele is full and the juice is sweet. It contains a lot of vitamin C and has high nutritional value. In addition, orange is the long wavelength part of the visible part of electromagnetic waves.

Citrus: It is the mature fruit of many kinds of citrus such as Rutaceae. The fruit is large, nearly spherical, with yellow skin, orange yellow or orange red, thick skin, thick sponge layer, loose texture, slightly difficult to peel, and oval seeds. Moderate sweet and sour, resistant to storage.