Minxiong and Dalin in Chiayi County are well-known pineapple-producing areas. Li Wenqian, a professor of chemical engineering at Chung Cheng University, observed that a large amount of pineapple skin waste was left after pineapple processing, which was a big problem for the processing factory, so he decomposed it with a patented enzyme Pineapple skin dregs and the production rate of xylooligosaccharides are as high as 22%. At present, a patent application has been sent out, and it is also negotiating cooperation with pineapple manufacturers.