So I recently watched a video on this. Black tea is fermented green tea, Europeans did not know this before getting that knowledge through a spy. Europeans "stole" everything regarding the production of tea, and poached a few Chinese tea masters along with it.

"Poached"? Did they enslave them? Or did they make them a deal and the masters decided they'd rather work for someone else?

Good book on this subject: https://www.goodreads.com/book/show/3081255-for-all-the-tea-...

The latter AFAIK, "poaching talent" is a pretty common term so I thought the meaning would be clear :-).