Tea leaves contain caffeine. Different types of tea have different caffeine contents. Generally speaking, green tea contains relatively low amounts of caffeine. For example, green tea contains approximately 20 - 35 mg of caffeine per 100 g of tea.

Chinese tea differs from tea from other places in terms of types and production techniques, quality characteristics, origins and varieties, drinking habits, history and culture, etc. Chinese tea has a rich variety of teas, diverse production techniques, unique quality characteristics, superior production environments, diverse drinking methods, and a long history of tea culture with rich connotations. Tea from other countries has formed different qualities and cultural characteristics under their own unique origins and production techniques.

• Natural factors: Most precious teas are produced in areas with unique natural conditions. The climate, soil, altitude, etc. in these areas provide an excellent environment for the growth of tea trees, creating the scarcity and unique quality of tea.

• Quality and variety: The taste, aroma and other qualities of high-quality tea varieties are better.

• Picking and production process: The picking standards for high-end tea are strict, and most of them are tender buds or one bud and one leaf, which takes a lot of time and manpower. Through traditional manual production, a lot of manpower costs are consumed, and the skills of tea makers are extremely high.
  

• Market supply and demand relationship: Due to limited production, tea is difficult to meet market demand, resulting in high prices.

• Time and storage costs: For teas with aging value such as black tea and white tea, fixed costs such as warehouses and time costs will be incurred during storage, and the number of vintage teas decreases over time, resulting in the price of vintage teas of the same grade being higher than that of new teas, and the older the year, the higher the price.