改革开放二十年 ,是建国以来我国城镇发展与建设最快的时期 ,特别是党的十三届四中全会以来 ,城市经济社会得到前所未有的发展 ,产业结构不断优化 ,城市的功能日臻完善 ,城镇化水平不断提高。到 2 0 0 1年底 ,我国有设市城市6 6 2个 ,其中 :百万人口以上的特大城市 41个 ;5 0 - Since the establishment of the People’s Republic of China, the rapid development and construction of cities and towns in our country have been two decades since the founding of the People’s Republic of China. Especially since the Fourth Plenary Session of the 13th Central Committee of the Party, the urban economy and society have enjoyed unprecedented development. The industrial structure has been continuously optimized and the urban functions have been improving. The level of urbanization continues to increase. By the end of 2001, there are 6,62 cities in our country, of which 41 are mega-cities with a population of over one million,