The calories of Ugly Orange are 37 calories/100g. The calories in an ugly orange are about 110 calories. The scientific name of the ugly orange is Shiranui, also known as the tangerine, the ugly orange, the ugly orange, etc. It was bred by the Horticulture Experimental Station of the Ministry of Agriculture and Water Resources of Japan in 1972 from a cross between the Kiyomi orange and the Nakano No. 3 ponkan. Shiranui citrus has a convex top shape and thick peel. In the early years when Shiranui was sold in Pujiang County, Sichuan, it registered a trademark name Chougan. It later became synonymous with Shiranui in China.

After grafting using high grafting technology, Shiranui mandarin oranges have large fruits in the Western Sichuan Basin, with an average fruit weight of 200 grams and a maximum of more than 400 grams. The fruit is obovate, with many protrusions and short necks; the peel is yellow-orange, starts to color in early October, and is completely colored in early December; the peel is yellow-orange, the fruit surface is slightly thick, and it is easy to peel. The sugar content of the juice is above 13%, up to 17%, and the taste is Extremely sweet; matures from February to March of the following year.