The economic winter began in a few years.

China's special national conditions make the historical track of China's economic and social transformation different from other countries, but it has experienced a unique road of industrialization and urbanization: First, 1840- 1948 has undergone a long evolution stage from the disintegration of traditional agriculture to the dual economic and social structure of urban and rural areas; Second, the differentiation and strengthening stage of urban-rural dual economic and social structure under the planned economy system of 1949- 1977; 1978- 1 With the rapid development of rural reform and rural industrialization, the dual economic and social structure began to disintegrate and gradually turned to the ternary economic and social structure, namely, the agricultural sector, the township enterprise sector and the urban formal sector; Fourth, the establishment and improvement of the socialist market economic system and the four-yuan economic and social structure after 1992 is accompanied by the rapid development of urbanization.