System of the present invention provides a kind of utilize and shows taste composition, the especially tealeaves of theamin acid, preparation method containing there are many, and makes novelty oolong tea beverage of the tealeaves semi-fermentedly to the tea extract of the object gained of fermentation.During total 5 days to 20 days in what tea picking about 20 days a few days ago, the covering with aeration for being 60 to 95% by shading rate, shielded from sunlight win tealeaves to cultivate tea tree, from tea tree, the tealeaves that will be won handles by semi-fermented or complete fermentation and obtains tealeaves. This tealeaves system contains the aobvious taste composition there are many tea, especially theamin acid. Further, by the tea extract of this tealeaves, and 100% catechin contained by opposite tea leave, by fermentation step, it is the tea extract mixing containing high concentration polymer catechin of 50% or more tealeaves gained from fermentation to the catechin amount of polymers generated, obtain that there is dense taste and aromatic sense, fragrance is relaxed and comfortable, the novelty oolong tea beverage of astringent taste also less.本發明係提供一種利用含有許多顯味成份，特別是茶胺酸之茶葉，其製法，以及使該茶葉半發酵至發酵之物所得之茶萃取物之新穎烏龍茶飲料。於茶葉採摘日前約20天內之合計5天至20天期間，由遮光率為60至95%之具有通氣性之覆蓋物，遮蔽陽光以培育茶樹，自茶樹摘取茶葉，將所摘取之茶葉，經過半發酵或完全發酵處理而得茶葉。此茶葉係含有許多茶的顯味成份，特別是茶胺酸。進一步，將此茶葉之茶萃取物，以及相對茶生葉所含之100%兒茶素，經過發酵步驟，自發酵至所生成之兒茶素聚合物量為50%以上之茶葉所得之含有高濃度聚合物兒茶素之茶萃取物混合，得到具有濃厚味道及香醇感，香味輕爽，澀味亦少之新穎烏龍茶飲料。
