This is one of the most unique teas I’ve ever tried. It’s got a weird wild zippy burnt type bitterness that goes off the charts if brewed for more than even 30 seconds. This tea requires very short steeps. Nice caffeine kick, and boy was it durable. It went as long as a pu erh. I don’t love it but it is really interesting. Some good descriptions on the YS China site by other reviewers.