Leaves used for black tea ferment for days before they're heated, causing the leaves to blacken and many chemical changes to happen within them.
而制作红茶的叶子会在被加热之前先进城数日的发酵，导致这些叶子变成黑色，并且在其中发成多种化学反应。
The tea soup with whitish green or whitish yellow is lack of aged time, with black brown mostly artificial ferment, with turbid or suspend has then gone bad.
茶汤泛青、泛黄为陈期不足，茶汤褐黑大多是人工后发酵茶，汤色混浊不清、有悬浮物的则是变质的普洱茶。
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