(On February 26, 2009, the development channel "Software Development in the SaaS Era" invited Mr. Wang An'an, a senior manager of Alibaba Software Research Institute, as a guest chat room to explain the new challenges posed to developers by the use and development of SaaS, such as the impact of SaaS and cloud computing, OpenAPI, language improvement, etc. on the existing technical framework and knowledge storage of developers and the update of development concepts. This document includes the following annexes:)