Different teas are made from the same tea tree. The difference between green tea - oolong tea - black tea
To tell the truth, there is only one type of tea tree.
Its name is also "Chanoki".
Green tea, oolong tea, and black tea are all made from the same tea tree.
A variety of teas can be made from the same tea tree. The only difference is neither roasting nor manufacturing, but "fermentation". Strictly speaking, it is "oxidation", but in the tea industry it is called "fermentation".
In fact, the tea leaves begin to oxidize the moment they are picked, and if left unattended, the tea leaves turn bright red and eventually rot. Therefore, heat is applied to green tea to stop oxidation. Oolong tea stops oxidation when it is half oxidized. Black tea continues to oxidize to the end and stops oxidation before it spoils.
If you think about it carefully, this is very interesting, and the only thing that can be tea is tea.
It may be tea in a broad sense, such as barley tea, dokudami tea, and herbal tea, but it is based on the recognition that tea is a drink with flavor.
Real teas are post-fermented teas such as green tea, oolong tea, black tea, and pu-erh tea (explained later).
That's why I always say wort instead of barley tea.