Introduction to the grading standard system of African coffee beans according to what classification of coffee beans

Friends who have tasted boutique coffee must have found that the coffee beans we drink have a variety of grades, so how are they divided? Each coffee producing area uses a different coffee grading system, such as Ethiopia and Kenya, the famous boutique coffee bean producing areas in Africa, and their grading methods are completely different. Ethiopian coffee beans are graded according to the defect rate. less than 3 defective beans per 300 grams of coffee beans is G1, that is, the top level, and 4 to 12 defective beans per 300 grams of coffee beans is G2, and so on. Of course, the boutique coffee beans we drink are basically the top grade G1 coffee beans. Kenyan coffee beans are graded by size, and the largest coffee bean grade is E, also known as elephant bean, which is a dysplastic coffee bean with a volume of more than 18 mesh, followed by AA level, which we drink most often. The size of this grade coffee bean is between 17 mesh and 18 mesh, and so on, the coffee beans divided later are smaller and smaller.