How many kinds of coffee should the roasting degree of coffee be controlled?

Blue Mountain Coffee: from Jamaica. Pure Jamaican Blue Mountain Coffee perfectly combines the unique sour, bitter, sweet and mellow flavors of coffee. The aroma is very rich, mellow and smooth, with long-lasting fruit flavor, forming a strong and attractive elegance, which is unmatched by other coffee. It can be said to be the best coffee. (2) Colombian coffee: produced in Colombia, roasted coffee beans release a sweet fragrance, with sweet in acid and medium in bitterness, moderate concentration and long-lasting fruit aroma. It is very nutritious, highly balanced and sometimes nutty. Because of the appropriate concentration, it is also used in high-grade mixed coffee. (3) Brazilian coffee: there are many kinds of coffee, most of which are moderately acidic, its sweet, bitter and mellow tastes are neutral, moderate concentration, smooth and special taste, known as the backbone of coffee, but also a very good blending bean. (4) Italian coffee: it has a strong aroma and strong bitter taste, and a thin layer of coffee oil appears on the surface of the coffee, which is the source of the attractive aroma of Italian coffee. Suitable for those who pursue a strong sense of taste. (5) Manning Coffee: produced in Indonesia's Sumatra Islands, full of grains, with a very strong flavor, spicy bitterness, people who especially like it will indulge in its bitterness. At the same time, it also has the taste of syrup and chocolate, while the sour taste is not prominent, but it has a strong mellowness, which is a favorite variety in Germany, and coffee lovers mostly drink it on their own. It is also an indispensable breed of mixed coffee. (6) Java coffee: produced in Java, Indonesia, full-grained, spicy, relatively low acidity, delicate taste, good balance, is a delicate aromatic coffee. (7) Costa Rican coffee: excellent flavor, smooth, strong acidity, high grade, with attractive flavor. Kenyan coffee: aromatic, full-bodied, well-balanced and delicious acidity, with excellent fruit flavor, rich and perfect taste. It is one of the most popular varieties in the industry. (8) mocha coffee: produced in Ethiopia, the beans are small and fragrant, its sour and alcoholic taste is strong, slightly alcoholic, spicy, moderate sweetness and special flavor. It is a well-known high-quality coffee, usually drunk individually. (9) Guatemalan coffee: produced in Antigua, which has fertile volcanic soil, is one of the most famous coffee varieties in the coffee industry. The fertile volcanic soil creates a world-famous soft, mellow taste with a hint of tropical fruit. Rich taste, perfect coordination, plus a trace of smoke, more emphasis on its antiquity and mystery. Many coffee experts have commented that Guatemalan coffee is the best kind of coffee in Central and South America.