Eco city in China

I came across this plan the other day when researching for another assignment. It presents an interesting concept of designing an urban settlement from scratch and attempting to make it completely economically and environmentally sustainable. A large amount of planning and other work has gone into this project and if successful could revolutionize modern planning. What implications would this have for predeveloped settlements that contain the mistakes of the past such as Auckland????
http://edition.cnn.com/2007/TECH/08/14/dongtan.ecocity/

Introduction

On Wednesday 23rd of March 2011, the Proposed Auckland Spatial Plan was introduced by Len Brown. Amongst other things, I found the Mayor's vision for the management of the natural environment to be particularly thought provoking; "Auckland becoming an eco city". Eco city is a word often bandied around within planning literature, but what exactly does it mean and what is its relevance to the Auckland Region? This blog will be used to explore ideas, concepts and examples related to 'eco cities' to try and gain a global understanding of the concept and its application to the Auckland Region. The starting point for this is the broad definition given by the Auckland Council within the previously mentioned document; "Being an eco city requires a strong commitment to conserving resources, minimising waste, preserving our biodiversity and natural habitat to enhance liveability, and generating new sustainable economic opportunities. It also calls on everyone to play their part to look at more efficient vehicles and renewable energy options for heating homes and work places" (Auckland Council, 2011). 

http://www.aucklandcouncil.govt.nz/EN/ABOUTCOUNCIL/PLANSPOLICIESPUBLICATIONS/THEAUCKLANDPLAN/DISCUSSIONDOCUMENT/Pages/environment.aspx