Sunshine orange is so delicious that it can't be separated from Sichuan's high-quality water source and fertile soil. Adequate sunshine, moderate sunshine, moderate rainfall and long frost-free period are the basic conditions for planting sugar oranges. In addition, it is necessary to have an open planting environment, good irrigation and drainage water and fertile soil. The areas that meet these conditions in China are mainly concentrated in Hunan, Jiangxi, Sichuan, Yunnan and other places.

oranges are mainly divided into sweet orange, navel orange, blood orange, sugar orange and red orange.

In China, young fruits and fallen fruits can be dried for medicinal purposes. Storage and transportation resistance. There is a big difference in maturity, which can prolong the supply period of fresh fruit and processing raw materials. Orange varieties can be divided into early, middle and late ripening according to fruit maturity.

In view of the high degree of commercialization of oranges, many varieties with their own characteristics were born under the market demand, such as late-maturing summer oranges (Mi Nai Xia Orange, olinda) to fill the gap in the market, and geographical protection varieties such as seedless orange Gannan navel orange which are beneficial to fresh eating. Many kinds of oranges are named after their places of origin (such as Xinhui Orange in China), and some kinds of oranges have even registered their trademarks (such as American Xiangji).

There have been some varieties of oranges in the long-term cultivation process of human beings, and some varieties have been preserved because they are beneficial to human beings. This species is often crossed with other citrus plants to produce better varieties. Sometimes the cultivated varieties of citrus plants also contain orange characters, but they actually do not belong to this species.