The researchers studied the effects of climate change factors such as monsoon, rainy season, high temperature and drought on the growth environment and quality value of tea in Pu'er, Yunnan Province. They traced the factors leading to the changes of chemical substances in tea and found that in the rainy season, when their growth speed is accelerated, the content of catechin and methylxanthine in leaves is only half of that in the dry season. 
Pu'er tea contains higher secondary metabolites in dry season, but if the dry season lasts too long, its content may decrease.
 the researchers believe that climate change will affect the content of beneficial chemicals in Yunnan Pu'er tea.