According to the different production processes, tea can be divided into six categories: green tea, black tea, oolong tea, white tea, yellow tea, and dark tea. Green tea is unfermented tea, black tea is a higher degree of fermentation, oolong tea is a semi-fermented tea, and white, yellow, and dark teas are gradually more fermented.
According to the different picking standards, tea can be divided into bud tea and leaf tea. Bud tea refers to the tea leaves that only pick the bud heads, such as Biluochun, Yinzhen, etc., while leaf tea refers to the tea leaves that pick one bud and one leaf or one bud and two or three leaves of the tea tree, such as Longjing, Maofeng, etc. In addition to the production process and picking standards, tea can also be classified according to its origin and quality characteristics. China is the world's largest tea producer, and its tea production areas are all over the country, and the tea from each origin has its own unique flavor and characteristics. For example, Hangzhou's Longjing tea is famous for its fragrant, mellow and fresh taste, while Anhui's Huangshan Maofeng tea is praised for its rich, mellow and sweet taste. 
In addition, the quality of tea also varies according to its growing environment, picking time, production process, etc. For example, high mountain tea has a strong aroma and fresh taste due to its high altitude growth, while flat tea may have a bland taste. The quality of spring tea is generally higher, because the temperature in spring is moderate, the tea grows slowly, and the nutrients accumulate more. The quality of summer and autumn teas may be slightly inferior to those of spring teas. There are various ways to classify tea, which can be classified from many aspects such as production process, picking standards, origin and quality characteristics. Each tea has its own unique flavor and characteristics, and consumers can choose the tea that suits them according to their tastes and preferences. At the same time, understanding the classification methods and characteristics of tea can also help us better appreciate and taste the various different tea cultures. 
In addition, there are many ways to classify tea according to its origin and characteristics. For example, according to the place of origin, it can be divided into Chinese tea, Indian tea, Sri Lankan tea, etc.; According to the characteristics, it can be divided into famous and high-quality tea, bulk tea, etc. Different types of tea have different characteristics and application scenarios. For example, green tea has the characteristics of being fragrant and refreshing, making it suitable for summer drinking; Black tea has the characteristics of rich and sweet, and is a classic drink for afternoon tea; Oolong tea has the characteristics of high aroma and mellow taste, which is suitable for drinking after meals; White, yellow and dark teas have the characteristics of a high degree of fermentation and mellow taste, which is suitable for winter drinking. 
In conclusion, there are many types of tea, and different teas have their own characteristics. Whether it is a tea lover or a tea practitioner, it is very necessary to understand the types and characteristics of tea. Only by having an in-depth understanding of the characteristics of tea can we better appreciate and enjoy the pleasure of tea tasting.