1. Look at the orange belly button. The navel of an orange is its compound fruit. The complex fruit will absorb the nutrients of the "mother" orange, and if it is too big, there will be white meridians inside, and the water content will not be as much as that of the small belly button, so it will not be delicious. So choose oranges with small belly buttons.

2. Look at the shape. Oranges come in two shapes: round and oval. Oval-shaped oranges are sweeter.

3. Look at the color. Ripe oranges are mostly orange-yellow, with some red in the yellow. Such oranges are more mature and sweeter.

4. Pinch the orange peel. It tastes better if the skin is elastic when pinched. Because oranges with thinner skins have more water, they are more elastic when pinched.

Extended information:

Classification of oranges:

1. Sweet orange. Sweet orange series include: rock sugar orange, red-fleshed navel orange, Sunkist orange, summer orange, etc.

2. Blood orange. Blood orange series include: Tarocco blood orange, rose blood orange, ruby ??blood orange, etc. The pulp and juice are all purple or dark red. The pulp is tender and juicy, with a special aroma. The Mediterranean region is its origin and main production area.

3. Red and orange. Red oranges are mainly produced in Lianjiang, Zhanjiang, Guangdong. Lianjiang red oranges have large fruits (a single fruit weighs about 150 grams), good fruit shape, orange-red flesh color, tender and smooth, juicey residue, sweet with sour taste, sweet and fragrant, and deep color. It is so popular that it is listed as a good fruit for state banquets, and Lianjiang is named the "Hometown of Red Oranges in China".

4. Navel orange. Gannan navel orange is a variant of navel orange. The fruits are larger than ordinary oranges, generally seedless, parthenocarpic, and easier to peel. Therefore, navel oranges are more suitable for fresh consumption. The main feature is that there is a cone-shaped accessory fruit in the fruit, which is characterized by a umbilicus on the top of the fruit, that is, there is a small underdeveloped fruit embedded in the top of the fruit. Seedless, the meat is crispy and tender, and the taste is sweet and slightly sour.