Fine Coffee: the Challenge of Coffee roasting to Coffee roasters

The entrance of coffee has five flavors: fragrant, sour, bitter, sweet and mellow. In the magical world of bakers, coffee is life. Coffee roasting is a challenge for coffee roasters, it requires coffee roasters to have great patience, to be highly focused, to listen to the cracking sound of coffee beans, to smell the formation and changes of coffee bean aroma, and to judge the exact color of coffee beans. The coffee beans are in the baking bin.