有诗云:“人间有仙品,茶为草木珍。声名噪海外,美誉入杯樽。”茶在中国有很深厚的文化底蕴,它几乎成了人们生活中不可少的一部分,有“不可一日无茶”之说。茶叶中所含的成份很多,将近500种。主要有咖啡碱、茶碱、可可碱、胆碱、黄嘌呤、黄酮类及甙类化 There is a poem: “There are immortals in the world, and tea is grass and wood. It is famous overseas and its reputation as a cup of tea.” “Tea has a profound cultural background in China and has become an indispensable part of people’s life. There are ”No day without tea " said. Tea contains many ingredients, nearly 500 kinds. Mainly caffeine, theophylline, theobromine, choline, xanthine, flavonoids and glycosides