As china begins to enter the automobile society,more and more people are talking about cars and related topics.In the past 2012,oil price,the car depreciates,school bus safety,new energy vehicles,motor vehicle tail number restricted driving and draw restricted purchase has become the hottest topic that people most concerned.Through this topic,we can see how the market factors and policy factors impact on Chinese auto society,and how the new internet media especially the emergence of the Social Web makes the tremendous change of the propagation of those topics. <<