There are many sites which have a following story on their web pages, a story which describe history of Earl Gray black tea:
"It is said that in 1830, an Englishman named Charles Earl Grey traveled on a diplomatic mission to China, where in return for his act of kindness, a local mandarin presented him with the recipe for making this distinctive tea. A few corrections are in order. Firstly, the Chinese have never been black tea drinkers, and were unlikely to have a recipe for Earl Grey to bestow on visitors. Secondly, Charles Earl Grey never set foot in China. Otherwise, the story is completely true."
Keemun is a Chinese tea. A province of Yunnan is famous for its black teas. This is the first time I hear Chinese have never been black tea drinkers. If there is any true in it, does it mean a black tea is grown in China mostly for export, and only younger generations enjoy the black tea ?