中国国情的基本特征之一是各地区条件差异显著,发展极不平衡,表现为“一个中国,四个世界”。这是清华大学国情研究中心主任胡鞍钢教授在其新著《地区与发展：西部开发战略》中提出来的。胡在其著作中认为：第一世界是如上海、北京、深圳等高收入发达地区。1999年上海和北京人均 One of the basic characteristics of China’s national conditions is that there are notable differences in conditions among various regions and unbalanced development, showing “one China and four worlds.” This is Professor Hu Angang, director of the National Research Center of Tsinghua University, put forward in his new book, “Regional and Development: The Strategy of Western Development.” In his book, Hu considers that First World is such a high-income developed area as Shanghai, Beijing and Shenzhen. 1999 Shanghai and Beijing per capita