Hello, my friends, as usual when we drink tea, we would have such mouth-feel of thirst quenching, do you know why do you have such mouth feeling? Because of organic acids, like malic acid, citric acid, and so on, which are also very important in wine(Well you may not feel its sourness when drinking tea actually, that’s because the other main ingredients like tea polyphonel, caffine, polysaccharides gives tea the strong tastes, which hide the sourness). 当我们喝茶时，讨论比较多的如回甘、生津等。生津

随着普洱茶的大热，业界开始有了古树，大树，小树等之分。物以稀为贵，“古树茶”也俨然成了一个价格标签。什么是古树茶，至今没有法定的规定。近代云南大量种植茶树，是在清道光之前（1820-1850）。清代末年，云南茶区战乱频繁，瘟疫连连，茶树的种植也一度荒废；直至民国初期（1910年代），方才开始在凤庆等地大面积种植；新中国成立后，计划经济与市场经济交替时代，云南地区最早一批大量种植茶树已然是二十世纪七、八十年代的事情。 因此，行业内普遍认为古树茶以树龄为100年为基准，具有比较科学的依据。2011年西双版纳颁布的《西双版纳傣族自治州古茶树保护条例实施办法》把古树茶的年龄划定为一百年，而“云南省古树普洱茶收藏研究会”同样认为“古茶园为1911年前人工栽培的自然状态生存下来的古茶园”。 Since pu-erh tea gained its popularity in early 21 century, some labels like ancient-tree tea, big - tree tea, came into the market, and