There are some kinds of tea, such as red tea, oolong tea and green tea.
However, all of them are made from the same kind leaves.
The difference is their production methods.
If we completely ferment the leaves, it will be red tea.
If we ferment in half degree the leaves, it will be oolong tea.
If we don’t ferment the leaves at all, it will be green tea.
By fermenting, the leaves’ green color change to bister color gradually.
In Japan, most tea that have been produced is green tea.
