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This document provides an overview and discussion of Web 2.0 concepts including rich user experiences, tagging, users as contributors, the long tail, participation over publishing, radical trust, and radical decentralization. It discusses several Web 2.0 features and business cases including Google applications, tagging on Flickr, the long tail effect, and Wikipedia. The document also examines Web 2.0 applications and opportunities in China, analyzing examples like DZZZW.com and Ctrip.com to discuss business models and how various Web 2.0 concepts apply.









































































