Oolong tea: why is it the most expensive tea in the world

Oolong tea is a type of tea that is very popular these days. Its popularity is caused by the many benefits and nutritional content present in Oolong Tea. This tea originates from China. This tea goes through a long process before it can be consumed. Oolong tea is actually black tea and green tea that are combined then rolled up and left to ferment.
Oolong tea has a very high content. Because of the many benefits contained in a cup of oolong tea, and the process is quite complicated and long, this tea is included in the category of the most expensive tea in the world.