After rationally promoting the miracle of China's economic growth in the past 30 years, Chinese peasants' strong expansionary power are facing challenges of a new social transformation era. Professor Xu Yong, director of the Institute of Political Science at Central China Normal University and Director of the Research Center for Chinese Rural Issues, who was invited to attend the Nandu Public Forum yesterday, believed that the rational expansion of peasants was an important driving force behind China's economic development as well as its being the first to recover from the economic crisis. However, he also proposed that such kind of rationality needed a transformation too. The innate defects revealed during the transformation period made not only the next generation of peasants but also no one else willing to cultivate the farmland any more, which became one of the most worrying problems in China.