The first time I had pu erh was a long time ago and I didn't even know it. Back then, the only thing I knew about tea was that I liked it a lot. One day a relative gave me a round colorful cardboard box with black Chinese characters. Inside the box, wrapped in paper, there was tuocha, a dome-shaped compressed tea, made of pu erh. I cannot describe the fascination this little box exerted on me. It might have not been very high quality tea but to me it was like a treasure. You had to grate the dome-shaped cake to make a cup of tea and this process alone had something magical to it. The tea was strong, intense.What is pu erh?