Life Cycle of Small and Medium-Sized Enterprises Based on External Environmental Perspective—Empirical Research that Takes 5 Metropolises Including Shenzhen as Samples

Based on the research of small and medium-sized enterprises' life cycle, plus the data and the information that acquired from cancelled small and medium-sized enterprises (SMEs) in Shenzhen, Guangzhou, Changsha, Zhengzhou, Chengdu five metropolises during 2000-2007 period, this paper evaluated and comparatively analyzed the relation between the life cycle of SMEs in the five metropolises and the external environment that SMEs sit in, revealed the relation and the internal mechanism of SMEs and their external environmental situation. Further more, the countermeasures how to prolong the life cycle of SMEs in our country is proposed from perspective both of government and corporation.