What a coincidence! My graduation thesis is about Gynostemma pentaphyllum. I come from Yongcheng, Henan, and I have Gynostemma pentaphyllum at home. The topic of this graduation thesis is the flavonoid content of Gynostemma pentaphyllum selected by myself. I bought it at a research institute called Pingli Gynostemma pentaphyllum, and I also inquired about Pingli's people. Many people said it didn't matter. Maybe this thing is too common in Pingli. In addition, Gynostemma pentaphyllum is not only good, but also has many Gynostemma pentaphyllum in the south, such as Zhangjiajie.