Is there no grading standard for Yunnan coffee beans?-Yunnan Coffee saipincoffee

Is there no grading standard for Yunnan coffee beans at all? generally speaking, in high mountain areas, due to the cold climate, slow growth rate of coffee, higher density of raw beans and harder texture, the more mellow aroma and supple sour taste of coffee; on the contrary, the density of raw beans is lower, the texture is less hard, the quality of coffee is worse, so some people divide it by hardness.