2. Chu orange refers to the sugar orange cultivated by Chu Shijian in Yunnan, which belongs to the category of sweet orange. It is round to rectangular in shape and orange in color. It contains a lot of vitamin C, with high nutritional value, high sweetness and low acidity, easy peel, full stele, sweet juice and no bitterness.

3. It is native to southern China and distributed in southern provinces, but it is cultivated in Yunnan, Guichuan, Guangdong, Taiwan Province and other provinces, and Chu orange is a unique orange in Yunnan. 65438+ was introduced to Europe from China at the beginning of the 5th century and to America at the end of the 5th century. It contains a lot of sugar, a certain amount of citric acid and rich vitamin C, and has high nutritional value. Fruit also contains vitamin P, which has high medicinal value. In China, young fruits and fallen fruits can be dried and used as medicine. Storage and transportation resistance. The maturity varies greatly, which can prolong the supply period of fresh fruit and processing raw materials. Sweet orange varieties can be divided into early, middle and late maturity according to fruit maturity.