What is the native variety? What is the grading system for Ethiopian beans?

Compared with Kenya, beans in Ethiopia are generally of different sizes and have significantly lower evenness. Whether it is Yega Xuefei or Sidamo, whether it is washing or sunlight, sometimes the same batch of coffee beans can be seen to be significantly different in baking color and particle size.

Why are Ethiopian coffee beans always big and small?

Regular Ethiopian coffee drinkers should have heard of the [Heirloom native species], most Ethiopian varieties will be named after this name, in fact, because there are so many Ethiopian varieties, it is like the natural gene bank of Arabica, on the one hand, there are many varieties, and it is difficult to identify and classify them, on the other hand, the Ethiopian government is reluctant to disclose these species information for the sake of protection, so it is collectively called [Heirloom native species].

The grading system of Ethiopian coffee:

In the classification system of Ethiopian coffee, a classification system starting with G and divided into 5 to 1 grades is the most common (Z is a new series that has just emerged in recent years). The smaller the number, the better, mainly looking at the defect rate, based on "every 300 grams of raw beans." the number of defective beans allowed is listed as follows:

Grade

Number of defects

Z

Zero Defect can be found but not sought.

G1

< 3   G2   4–12   G3   13–25   G4   26–45   G5   46–90   UG   排不进分级   埃塞俄比亚约在1970年代引进水洗处理，当时，水洗被视为较高级的方法，因为比较容易得到整齐的品质。因此，早年只有水洗排得进G1–G3，日晒则在G4–G5。不过，近年来，市场上涌现的日晒复兴浪潮，让排得进前三等级的日晒豆，也开始出现，并成为常态。 水洗豆Grade1代表每300克生豆中有瑕疵豆0～3颗; Grade2代表每300克中有缺点豆4～12颗。当然，实际上卖家和买家的瑕疵豆标准肯定是有点不同的（要不然为什么我们可以挑出来那么多瑕疵豆？），但是瑕疵率的对比还是很轻易分辨得出。G1的瑕疵豆明显要比G2的少，这也就是说，排除具体风味和烘焙程度的影响，埃塞俄比亚G1的咖啡豆要比G2的咖啡豆更加优质、评分更高，起码在瑕疵风味上很明显可以区分开来。