"fresh" is the most important factor in buying coffee beans.

1. Look: grab a handful of coffee beans and feel whether they are solid beans with the palm of your hand.

2. Smell: whether it is enough to smell the fragrance close to the nose.

3. Pressure: fresh coffee beans are fresh and crisp, and the fragrance floats out when they crack. You can put a bean into your mouth and bite it twice. The crisp sound indicates that the beans are well preserved without dampness.

4. Color: dark black coffee beans, the coffee brewed has a bitter taste; yellow coffee beans, the coffee brewed has a sour taste.

Good coffee beans: neat shape, bright color, roasted by single stir-fry, mellow after cooking, full of stamina.

Bad coffee beans: different shapes, incomplete individuals, light fragrance after cooking, not sweet enough.

From the above, we can draw the following summary:

Fermented beans: coffee beans that fall from the soil before harvest. The sour smell will have a great impact on the taste of coffee.

Dead beans: also known as unripe beans, or affected by climate and other factors, imperfect development, fried spots will be produced after baking, so that the coffee has a green taste.

Black beans: fermented beans, rotten, blackened coffee beans. Because it is black, it can be distinguished from normal coffee beans at a glance.

Borer beans: coffee beans eroded by insects

Defective beans: may be stuck during work, or carelessly handled during handling, resulting in incomplete coffee beans. Will cause fried spots when baking, and will produce bitter and astringent taste.