The wide use of information communication technologies (ICT) is now a new characteristic of urban life. In planning terms, there are timely questions to ask: what are the new forms of planning brought in by these new technologies? What are their opportunities and challenges? In order to answer these questions, this chapter reviews the evolution of planning support science in China, focusing on its impacts on the three stages of planning. Then it provides several case studies of urban development projects in Guangzhou, teasing out the details of the real impacts. The chapter concludes that planning support systems have been applied in three key stages of planning in China, including urban plan preparation, the adoption of urban plans and planning implementation. However, challenges lie in the lack of collaborative culture in the original planning system, and the on-site and off-site dilemma that this new technology brings, as well as the planning capability to respond to the shared economy.