This probably won't help, but might be interesting.
Once when I was in Hong Kong, (pre China reacquisition) I was out on the economy and noticed that there were countless shops with tea freshly brewed and sitting on a stainless shelf awaiting purchase. At the first one I went to, I bought a cup. It was served in a small glass. It was delicious. I could not speak Chinese, so made the purchase with sign language never knowing the name of the tea I had bought. Throughout the day, I bought probably 10 more cups of tea. Not knowing the name of the delicious tea, I tried to match the color. I never found a cup as good as the first, and I have to admit, some of them were terrible bitter concoctions. I was told later that I might have tried medicinal elixirs to cure any number of ills. I had one great cup of tea, a few good cups and some very odd and foul brews.