What is the origin of Ciqikou aged twist?

Chen Mahua of Ciqikou is actually a person named Chen Changyin who sells Mahua in Ciqikou. The twist he made was really delicious, fragrant and crisp, and later became famous. So if I go to buy the twist now, I will only buy the twist from Chen Changyin, because it is the old flavor of Chongqing. When you come to Chongqing, I also suggest that you can buy some Chen Changyin's twist. Whether you eat it yourself or give it away, it is a must-buy specialty in Chongqing.