Yunnan Black Organic Tea Yunnan Black Organic Tea an exceptional China tea with a precious, slightly sweet taste to finish. Yunnan is one of the oldest tea-growing areas in China with a history of more than 700 years. Cup Colour: brown. Amount of tea per cup: 1 heaped teaspoon. Brewing time: Use freshly drawn water at boiling point and steep/brew for 3 to 5 minutes.