I agree tea style cannot be learn in one day. Course in Holland took me 12 whole days spread in 1 year. I want reall professional advice ottherwise I went to a teahouse and learn it from tea girls. Due to circumstances I am not be able to travel to China. Since I am in HK I need to start somewhere. You make your point next time I will plan a trip to a teagarden.
Indeed Nana mint is a type of mint, like spear mint.
It is gunpowder green tea that they use in Marocco. They even boil it. Nana mint leave with a lot of suggar. It helps to calm and cool you down. It can be very hot in Marocco. Normally it is not done to boil green tea.
I hope a teamaster in HK can help to learn these things!