I reside part time in Bangkok where there is vibrant Burmese community operating Burmese restaurants and shops especially in Phra Khanong (พระโขนง) area.
Often when I sit to rest in Burmese restaurants for a snack or for a meanl there are teapots with what I can name as "Black tea" which for me is very strong in its caffeinerig effect, like drinking 5 cups of green tea or 5 cups of weak coffee, perhaps.
This Black Tea beverage is served hot.
What is the English name of it? Is it made of Camellia sinensis in general or a particular cultivar or a totally different plant?