1. Types of coffee: There are many kinds of coffee, including espresso, American coffee, latte, cappuccino, mocha, blue mountain coffee and so on. Each coffee has its own unique formula and making method.

2. Choice of coffee beans: The quality and variety of coffee beans have an important influence on the taste and mouthfeel of coffee. When choosing coffee beans, we should pay attention to their origin, grade, baking degree and other information.

3. Preservation of coffee beans: In order to keep the freshness and taste of coffee beans, it is necessary to store them in a dry, cool and ventilated place to avoid direct sunlight and humidity.

4. Use of coffee machine: When using coffee machine to make coffee, you should choose appropriate parameters according to different coffee types and machine instructions, such as water temperature and pressure.

5. Steps of making coffee: Making coffee needs to follow certain steps, including grinding beans, brewing, filtering and so on. Each step has its own skills and precautions.

6. Coffee tasting: When tasting coffee, we should pay attention to the characteristics of its color, aroma and taste, and try to feel the differences in flavor and taste.

The above are some basic coffee knowledge, which can help novice Xiaobai better understand and master the skills and methods of making and tasting coffee. If you have more time and interest, you can further study and explore more knowledge and skills about coffee.