Black Silk, also known as Qu Hao, is, simply put, one of the best teas you'll ever try. A cup of Black Silk offers an extremely smooth and silky finish in the mouth. Qu Hao comes from the Wuyi mountains in the Fujian province of China. It is plucked only once a year, making it a very rare treat. Approx. 10-12 servings per ounce.