The kumquat tree is elegant in appearance, bright green, white as jade, fragrant, and has brilliant golden fruits hanging from the branches. Qian Shisheng, a poet from Zhejiang Province in the Ming Dynasty, wrote about golden oranges: "You can't help but steal the dense golden pills. The most pitiful thing is hanging on the treetops. The old people have no share in the food and drink, so they are reserved for two eyes in late autumn." It can cure cough, eliminate food accumulation, treat qi stagnation and stomach pain, mastitis and breast hyperplasia. The Kumquat genus is native to my country and has a history of 4,000 years. The fruit is small, the outer skin and flesh are sweet and edible, and the flesh is sweet or sour. The seeds are oval and the embryo is green. There are 4 species and 2 hybrids in this genus. They are used as flowers and trees. Cultivation includes kumquat and round kumquat. Excellent varieties of kumquats: (1) Golden beans are also known as mountain kumquats, mountain oranges, and mountain kumquats. They are wild small shrubs with round fruits as big as soybeans. They taste sour and bitter and cannot be eaten raw. (2) Kumquat, also known as kumquat, golden jujube, milk kumquat, jujube orange, goat milk orange, and long-lasting kumquat. The branches are densely grown, the internodes are short, and there are few thorns. The fruit is oblong or obovate, golden yellow, and can be eaten raw or potted for viewing. (3) Round kumquats are also known as ribs and kumquats. The fruit is as small as a cherry, round, with pine skin, and bright orange. It can be eaten raw or processed, and can be potted for viewing. (4) Long-leaf kumquat, produced in Guangdong and Hainan Island, has no needles, extremely long leaves, lanceolate shape, wing leaves on the stalk, spherical fruit, and thin skin. There are 2 variants: golden bullet and moon orange. (6) Yueyue tangerine is also known as longevity tangerine, longevity tangerine, longevity tangerine, and four-season tangerine. It is used as a potted ornamental plant. There is also a kind of Nian tangerine, which is a wide-skinned tangerine and is produced in Guangdong. The fruit is oblate, with bright yellow or slightly red skin, thin and smooth skin, sweet and sour taste, relatively high yield, and matures during the Spring Festival, so it is often used as New Year gifts.