When I was traveling in Gulangyu Island, Xiamen, I invited an island resident as a tour guide and took me to buy a kind of tea. Taste it first. It tastes bitter.
This should be Kuding tea, which is a traditional pure natural health drink in China. It comes from the leaves of Ilex macrophylla (scientific name: Hollyleaf broadleaf). Born on hillsides, bamboo forests and bushes. Distributed in provinces and Fujian in the lower reaches of the Yangtze River.