I thought of an idea. Everyone knows puer - exactly by the name, puer;
or puer cha 普洱茶. Puer is the name of a place and the name of a tea.
Yet it's also hei cha.
So, since the hei cha they are marketing is not from Yunnan, but
Hunan, maybe they could call it xiang cha 湘茶; or even Hunan Xiang Cha 湖
南湘茶.