The urban construction in our country develops at a rapid speed: one year sees a change in appearances; and three years a major change. Consequently the evolution of urban morphology is fast and radical, demonstrating many new features, which are dizzying even dazzling. Urban space expands at a high speed and urban planning practice develops in an unprecedented manner. In this context, to explore the genetic mechanism behind the evolution of urban morphology is of theoretical and practical significance. The...