This idea was first seen in the article "The Origin of Tea Tree" by Wu Juenong, published in 1922. The article points out that "China has thousands of years of tea industry history, and it is the place where the world needs tea... No one is impossible to deny that China is the origin of tea." It is from Chinese more than 2,700 years ago, Shennong's use of tea for medicine, the history of tea cultivation and utilization, and the modern investigation of the distribution of tea trees, suggesting that tea trees are native to China.
1 China was the first country to use and cultivate tea trees. As early as in the Qin and Han dynasties, which Er Ya Shi Mu, a book about words was made in BC 200, it was called "槚, bitter tea."
2 Most of Camellia plants in southwestern China. There are more than 380 species of 23 genera in the world, including 260 species of 15 genera in China.
3 China found wild big tea trees at the earliest. China discovered wild big tea trees more than 1,700 years ago. According to incomplete statistics, there are now more than 200 wild tea trees found in more than 10 provinces and 200 cities in China. Among them, there are more than 10 big tea trees with a trunk diameter of more than 1 meter in Yunnan Province.
4 The most abundant genetic diversity of Chinese tea tree germplasm resources. According to the RAPD analysis of 15 Chinese cultivars and 24 wild tea trees in Yunnan, by Chen Liang, it showed that Chinese tea trees are rich in genetic variability, the intra-specific and inter-specific reach 94.2% and 95.4%, the genetic distance is between 0.16 and 0.62, which is richer than tea trees in Japan, Korea, India and Kenya.
5 Camellia L., Sect.Thea（L.） Dyer in Yunnan has the most species and the most varied forms. Chinese scientists and technicians have carried out investigations and identification studies on Yunnan tea resources for more than 20 years, and combined with the analysis of Yunnan geological change history, it is proposed that Yunnan is The geographical origin of tea trees and the center of cultivation origin.