With the rapid development of China’s economy, the annual growth rate of in- vestment in capital assets in the country’s urban construction reached 25% in recent years. Besides being a roll booster for the economic development, the large-scale With the rapid development of China's economy, the annual growth rate of in- vestment in capital assets in the country's urban construction reached 25% in recent years. Besides being a roll booster for the economic development, the large-scale