This document discusses the history and development of Nokimi Lai's app called Diandian from 2009 to 2017. It started as an Instagram browsing app in 2009 and gradually expanded to include member points and payments. By 2016, it had over 400 partner stores in Taiwan and 30 in Macau. The document outlines the revenue model and provides tips on using tools like Cacoo, Sketch, Invision, and Trello for wireframing and prototyping apps.