Very interesting, and these things help me to understand a little more about the traditional culture. It’s interesting that oolong and black teas seem to have been used as substitute teas for visiting laypeople as well.
Actually, I have often thought that green tea has a certain effect that is helpful for meditation. It seems to help clarify the mind, helping to energize it a little while keeping it balanced and refreshed. Of course, not all green teas have exactly the same effects, but those are general impressions I have gotten, at least. Most other types of tea have not done the same for me. Maybe exceptions to this would be certain green oolongs and dancong oolongs.
I did not know that Longjing also was developed by monks. I guess a certain lifestyle can be conducive to the development of refined teas. To at least a certain extent, they would have made the teas that they enjoyed the most.
