Cha means tea. Chinese tea is a wonderful and can be as complex as wine. My husband loves Chinese tea and drinks it all the time. I prefer to "play" with tea, being continually fascinated by tea arts and tea culture, and I love collecting tea paraphernalia as a hobby, especially those made by craftsmen in Taiwan and Japan.
Here is a picture story showing how to brew a cup of really good Cha. Courtesy of umami husband.