1. The origin and development of tea: The origin of tea can be traced back to the Qin and Han Dynasties in China. After thousands of years of development, tea has become a representative of global tea culture. There are many types of tea, including green tea, black tea, oolong tea, white tea, yellow tea, etc.

2. Tea growing environment and picking methods: Tea trees prefer temperate climates and high altitude areas, and generally grow between 800-1200 meters above sea level. Tea leaves are generally picked in spring, but some people advocate picking in summer and autumn.

3. Tea production process: The production process of tea includes picking, fixing, rolling, fermentation, drying and other links. Every step is very important to ensure the quality and taste of the tea.

4. Tea tasting and evaluation: Tea tasting and evaluation is a broad and profound knowledge, including appearance, aroma, taste and soup color. Different teas have different quality standards and evaluation methods.

5. Tea culture and tea ceremony: Tea culture is an important part of traditional Chinese culture, and tea ceremony is a kind of etiquette and culture based on tea. The tea ceremony emphasizes the beauty of pure mind, meditation and ritual. It is an art of self-cultivation.

6. Efficacy and functions of tea: Tea not only has the functions of clearing the mouth and throat, quenching thirst and refreshing the mind, but also has health-care functions such as antioxidant, lipid-lowering and weight loss, and disease prevention.

7. The inheritance and development of tea culture: With the changes of the times and the development of society, tea culture is also constantly developing and inheriting. Now tea has become one of the important representatives of Chinese culture, and it is also constantly going to the world and becoming a part of world culture.