There are hundreds of apple varieties, divided into three categories: wine varieties, cooking varieties, and fresh food varieties. The three types of varieties have different characteristics such as size, color, fragrance, smoothness (and possibly brittleness and flavor). Many varieties have high sugar content, medium acidity and low tannin content. In addition to being eaten raw, apples are also cooked in many ways. They are often used as fillings for desserts. Apple filling scones may be the earliest American-style sweets. Fried apples are often eaten with sausages, pork chops and other dishes, especially in Europe. The latest taxonomic evidence shows that there are only 38 species in the genus Malus. It does not seem to be difficult to find a "genus tree", but each species seems to have something in common with the apples we eat, and each species has Some fruits can be provided, although some of them are not very tasty. From this perspective, each species of the genus Malus may contribute to the sweetness of apples in supermarkets. about 2000 years ago, it was planted in orchards all over the world. Apple trees are mostly cross-pollinated, and 2% to 4% of the flowers and fruits are ideal. Although the size, shape, color, and acidity of ripe apples vary greatly depending on the variety and environmental conditions, they are usually round, 50-100 mm in diameter, and reddish or yellow. China is a big country producing apples, accounting for 65% of total apple production. Main varieties: Luochuan Fuji in Shaanxi, Yanchuan Fuji in Shaanxi; Gansu Tianshui Huaniu Apple, Shandong Red Star, Shanxi Wanrong, etc. On the island of Bardsey, North Wales, in the United Kingdom, new varieties have been discovered in recent years, which are healthier than ordinary fruit trees. Except for pests, they are not diseased. They are called the rarest apples in the world by the media. The main varieties are: Liaofu, Hanfu and its bud variant line, Zaojie; Xia Lu; Fushuai; Anna, Tengmu No. 1; Jesse Mike; Shanxin Gala and its bud variant line; Shouhong; Xinhongxing; Super red; Hongyu; Qianqiu; Huaguan; New World, Jonagold and its bud variants; Qin Guan; Wang Lin, Shouhong; Lingbao Apple-Huaguan; Qixia Apple-Red Fuji; Huaniu; Beidou; Jinshuai; Dasha.