Had two samples from the Yunnan Sourcing Mystery Machine tonight with my good buddy. Alpha tasted like a Bulang to me, but a little too weak. First two infusions were decent enough, although simple, but after the third infusion the tea dropped out completely! Hopefully this was a fluke, but otherwise it wasn't that great . Beta, however, tasted like a Youle to me, and I'm a big fan of Youle teas. This one went on for much much longer than Alpha, and was sweet with a good backbone. I'm interested to try the rest soon.