SaaS Dianping.com, launched in 2019, is a platform for exchange of SaaS software selection, dedicated to helping enterprises find suitable products.This is a series of articles on the theme of [UI design prototype design] by Lao Zhang, a cooperative type selection consultant.This chapter is an Internet product design tool, product prototype design Somehow, the right words are always late and miss the most appropriate time——Haruki Murakami