First of all, there is no absolute boundary between wild tea and cultivated tea. Before human cultivation and utilization, tea trees were wild, and cultivated tea plants were domesticated from wild tea plants.
At present, there are five concentrated distribution areas of wild tea trees in China: (1) Dachang tea distribution area in Yunnan, Guangxi and Guizhou; (2) protoaxis tea distribution area in Southeast Yunnan; (3) Dali tea distribution area in southwest and southern Yunnan; (4) tufang tea distribution area in Yunnan, Sichuan and Guizhou; (5) bitter tea distribution area in Guangdong, Jiangxi and Hunan.
These five areas are concentrated near the 24 ° N line and spread to both sides. Among them, the number of wild tea trees is the largest in the south, southwest and southeast of Yunnan Province, followed by Guizhou and the west of Guangxi, and the south of Sichuan Province.
On both sides of Nanling Mountain range is the distribution area of bitter tea. Bitter tea contains a lot of phenolic acids, such as flavonoids and anthocyanins; the second is that the content of catechins and esters that constitute the bitter taste is higher; the third is that it contains a specific bitter substance called eugenol glycoside, which has a strong bitter taste.
On the whole, China’s wild tea plants are most distributed in Southwest China, and more than 100 wild tea plants have been investigated and recorded in detail.