In China, there is a strict and clear definition on the Pu Er tea plants. If the tea plant is without the main trunk, short, growing in Yunnan, then this tea plant is tea bush. If the tea plant has its main trunk, tall, then it is the arbor; In the arbor tea trees, there is also small arbor tree(within 150 years old); we will only define the old arbor tree tea for over 200 years old. Check the pictures for your reference. Bush, Small arbor, arbor Pu Er teas diverse a lot in its taste, aroma, throat feeling. Take green Pu Er with 1 year old as an example: Bush, taste is very astrigent, less sweetness and throat feeling. small arbor, taste is good, but compared to arbor, it still has some astrigent; sweetness is good, but its throat feeling is not as deep as the arbor. arbor, thick, mellow taste, with super long-lasting sweetness, throat feeling, and high aroma. The difference of the three varieties lie in their interior ingredients in the leaves. So that is why arbor Pu Er teas are so expensive and limited in amount. In the market, even in China, no factories produce the puer arbor Pu Er tea, because of limited amount, low profit, except some tea experts collect the arbor Pu Er tea Maocha to make their own private collection or sell as the luxury teas.